215123232654 has 96 divisors (see below), whose sum is σ = 525165604704. Its totient is φ = 63082506240.

The previous prime is 215123232641. The next prime is 215123232671. The reversal of 215123232654 is 456232321512.

215123232654 is a `hidden beast` number, since 2 + 1 + 51 + 232 + 326 + 54 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 625654 + ... + 906470.

It is an arithmetic number, because the mean of its divisors is an integer number (5470475049).

Almost surely, 2^215123232654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215123232654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262582802352).

215123232654 is an abundant number, since it is smaller than the sum of its proper divisors (310042372050).

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

215123232654 is a wasteful number, since it uses less digits than its factorization.

215123232654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280962 (or 280959 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The spelling of 215123232654 in words is "two hundred fifteen billion, one hundred twenty-three million, two hundred thirty-two thousand, six hundred fifty-four".