231025542015421 has 32 divisors (see below), whose sum is σ = 249459252074208. Its totient is φ = 213137626890240.

The previous prime is 231025542015349. The next prime is 231025542015439. The reversal of 231025542015421 is 124510245520132.

It can be written as a sum of positive squares in 16 ways, for example, as 7401332450521 + 223624209564900 = 2720539^2 + 14954070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231025542015421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231025542015451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13042702261 + ... + 13042719973.

It is an arithmetic number, because the mean of its divisors is an integer number (7795601627319).

Almost surely, 2^{231025542015421} is an apocalyptic number.

It is an amenable number.

231025542015421 is a deficient number, since it is larger than the sum of its proper divisors (18433710058787).

231025542015421 is a wasteful number, since it uses less digits than its factorization.

231025542015421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30241.

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 231025542015421 its reverse (124510245520132), we get a palindrome (355535787535553).

The spelling of 231025542015421 in words is "two hundred thirty-one trillion, twenty-five billion, five hundred forty-two million, fifteen thousand, four hundred twenty-one".