215352040 has 32 divisors (see below), whose sum is σ = 500175360. Its totient is φ = 83361600.

The previous prime is 215352037. The next prime is 215352043. The reversal of 215352040 is 40253512.

It is an interprime number because it is at equal distance from previous prime (215352037) and next prime (215352043).

It is a super-2 number, since 2×215352040² = 92753002264323200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (215352043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85596 + ... + 88075.

It is an arithmetic number, because the mean of its divisors is an integer number (15630480).

Almost surely, 2^215352040 is an apocalyptic number.

215352040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215352040 is an abundant number, since it is smaller than the sum of its proper divisors (284823320).

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

215352040 is a wasteful number, since it uses less digits than its factorization.

215352040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173713 (or 173709 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 215352040 is about 14674.8778529840. The cubic root of 215352040 is about 599.3994361093.

The spelling of 215352040 in words is "two hundred fifteen million, three hundred fifty-two thousand, forty".