215291430 has 24 divisors (see below), whose sum is σ = 559757952. Its totient is φ = 57411024.

The previous prime is 215291429. The next prime is 215291437. The reversal of 215291430 is 34192512.

It is a junction number, because it is equal to n+sod(n) for n = 215291394 and 215291403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215291437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1195974 + ... + 1196153.

It is an arithmetic number, because the mean of its divisors is an integer number (23323248).

Almost surely, 2^215291430 is an apocalyptic number.

215291430 is an abundant number, since it is smaller than the sum of its proper divisors (344466522).

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

215291430 is a wasteful number, since it uses less digits than its factorization.

215291430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392140 (or 2392137 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 215291430 is about 14672.8126138106. The cubic root of 215291430 is about 599.3431979475.

The spelling of 215291430 in words is "two hundred fifteen million, two hundred ninety-one thousand, four hundred thirty".