215431960 has 32 divisors (see below), whose sum is σ = 489178800. Its totient is φ = 85380480.

The previous prime is 215431949. The next prime is 215431967. The reversal of 215431960 is 69134512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215431967) 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, 20346 + ... + 29065.

Almost surely, 2^215431960 is an apocalyptic number.

215431960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215431960 is an abundant number, since it is smaller than the sum of its proper divisors (273746840).

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

215431960 is a wasteful number, since it uses less digits than its factorization.

215431960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49531 (or 49527 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 215431960 is about 14677.6006213550. The cubic root of 215431960 is about 599.4735753005.

The spelling of 215431960 in words is "two hundred fifteen million, four hundred thirty-one thousand, nine hundred sixty".