31431501025145 has 32 divisors (see below), whose sum is σ = 40960922655744. Its totient is φ = 23016441139200.

The previous prime is 31431501025129. The next prime is 31431501025201. The reversal of 31431501025145 is 54152010513413.

It is a happy number.

It is not a de Polignac number, because 31431501025145 - 2⁴ = 31431501025129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126641 + ... + 7929630.

It is an arithmetic number, because the mean of its divisors is an integer number (1280028832992).

Almost surely, 2^{31431501025145} is an apocalyptic number.

It is an amenable number.

31431501025145 is a deficient number, since it is larger than the sum of its proper divisors (9529421630599).

31431501025145 is a wasteful number, since it uses less digits than its factorization.

31431501025145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8056793.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 31431501025145 its reverse (54152010513413), we get a palindrome (85583511538558).

The spelling of 31431501025145 in words is "thirty-one trillion, four hundred thirty-one billion, five hundred one million, twenty-five thousand, one hundred forty-five".