215046240 has 48 divisors (see below), whose sum is σ = 677397168. Its totient is φ = 57345536.

The previous prime is 215046239. The next prime is 215046241. The reversal of 215046240 is 42640512.

It is an interprime number because it is at equal distance from previous prime (215046239) and next prime (215046241).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 215046240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215046241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223527 + ... + 224486.

It is an arithmetic number, because the mean of its divisors is an integer number (14112441).

Almost surely, 2^215046240 is an apocalyptic number.

215046240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215046240 is an abundant number, since it is smaller than the sum of its proper divisors (462350928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215046240 is a wasteful number, since it uses less digits than its factorization.

215046240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448031 (or 448023 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 215046240 is about 14664.4549847582. The cubic root of 215046240 is about 599.1155858822.

Adding to 215046240 its reverse (42640512), we get a palindrome (257686752).

The spelling of 215046240 in words is "two hundred fifteen million, forty-six thousand, two hundred forty".