215231743470 has 32 divisors (see below), whose sum is σ = 539015150592. Its totient is φ = 54899690912.

The previous prime is 215231743421. The next prime is 215231743483. The reversal of 215231743470 is 74347132512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155964342 + ... + 155965721.

It is an arithmetic number, because the mean of its divisors is an integer number (16844223456).

Almost surely, 2^215231743470 is an apocalyptic number.

215231743470 is an abundant number, since it is smaller than the sum of its proper divisors (323783407122).

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

215231743470 is a wasteful number, since it uses less digits than its factorization.

215231743470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311930096.

The product of its (nonzero) digits is 141120, while the sum is 39.

Adding to 215231743470 its reverse (74347132512), we get a palindrome (289578875982).

The spelling of 215231743470 in words is "two hundred fifteen billion, two hundred thirty-one million, seven hundred forty-three thousand, four hundred seventy".