231515445220134 has 16 divisors (see below), whose sum is σ = 463031380117872. Its totient is φ = 77171733460448.

The previous prime is 231515445220127. The next prime is 231515445220177. The reversal of 231515445220134 is 431022544515132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14107509 + ... + 25730384.

It is an arithmetic number, because the mean of its divisors is an integer number (28939461257367).

Almost surely, 2^{231515445220134} is an apocalyptic number.

231515445220134 is an abundant number, since it is smaller than the sum of its proper divisors (231515934897738).

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

231515445220134 is a wasteful number, since it uses less digits than its factorization.

231515445220134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40806471.

The product of its (nonzero) digits is 576000, while the sum is 42.

Adding to 231515445220134 its reverse (431022544515132), we get a palindrome (662537989735266).

The spelling of 231515445220134 in words is "two hundred thirty-one trillion, five hundred fifteen billion, four hundred forty-five million, two hundred twenty thousand, one hundred thirty-four".