231551425022045 has 16 divisors (see below), whose sum is σ = 285059266471728. Its totient is φ = 180456116405760.

The previous prime is 231551425022033. The next prime is 231551425022069. The reversal of 231551425022045 is 540220524155132.

It can be written as a sum of positive squares in 8 ways, for example, as 21296175989284 + 210255249032761 = 4614778^2 + 14500181^2 .

It is not a de Polignac number, because 231551425022045 - 2⁶ = 231551425021981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231551425021993 and 231551425022011.

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, 834070334 + ... + 834347903.

It is an arithmetic number, because the mean of its divisors is an integer number (17816204154483).

Almost surely, 2^{231551425022045} is an apocalyptic number.

It is an amenable number.

231551425022045 is a deficient number, since it is larger than the sum of its proper divisors (53507841449683).

231551425022045 is a wasteful number, since it uses less digits than its factorization.

231551425022045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668418960.

The product of its (nonzero) digits is 480000, while the sum is 41.

Adding to 231551425022045 its reverse (540220524155132), we get a palindrome (771771949177177).

The spelling of 231551425022045 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred twenty-five million, twenty-two thousand, forty-five".