31145021531254 has 32 divisors (see below), whose sum is σ = 48330655865856. Its totient is φ = 15042376706880.

The previous prime is 31145021531251. The next prime is 31145021531269. The reversal of 31145021531254 is 45213512054113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145021531251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45156339 + ... + 45840865.

It is an arithmetic number, because the mean of its divisors is an integer number (1510332995808).

Almost surely, 2^{31145021531254} is an apocalyptic number.

31145021531254 is a deficient number, since it is larger than the sum of its proper divisors (17185634334602).

31145021531254 is a wasteful number, since it uses less digits than its factorization.

31145021531254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690060.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 31145021531254 its reverse (45213512054113), we get a palindrome (76358533585367).

The spelling of 31145021531254 in words is "thirty-one trillion, one hundred forty-five billion, twenty-one million, five hundred thirty-one thousand, two hundred fifty-four".