215431150 has 24 divisors (see below), whose sum is σ = 437130504. Its totient is φ = 78338400.

The previous prime is 215431147. The next prime is 215431159. The reversal of 215431150 is 51134512.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215431159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195297 + ... + 196396.

It is an arithmetic number, because the mean of its divisors is an integer number (18213771).

Almost surely, 2^215431150 is an apocalyptic number.

215431150 is an abundant number, since it is smaller than the sum of its proper divisors (221699354).

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

215431150 is a wasteful number, since it uses less digits than its factorization.

215431150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391716 (or 391711 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 215431150 is about 14677.5730282632. The cubic root of 215431150 is about 599.4728239818.

Adding to 215431150 its reverse (51134512), we get a palindrome (266565662).

The spelling of 215431150 in words is "two hundred fifteen million, four hundred thirty-one thousand, one hundred fifty".