31145021531151 has 32 divisors (see below), whose sum is σ = 45747148462080. Its totient is φ = 18690273266400.

The previous prime is 31145021531111. The next prime is 31145021531159. The reversal of 31145021531151 is 15113512054113.

It is not a de Polignac number, because 31145021531151 - 2³⁷ = 31007582577679 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145021531159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28071996 + ... + 29160366.

It is an arithmetic number, because the mean of its divisors is an integer number (1429598389440).

Almost surely, 2^{31145021531151} is an apocalyptic number.

31145021531151 is a deficient number, since it is larger than the sum of its proper divisors (14602126930929).

31145021531151 is a wasteful number, since it uses less digits than its factorization.

31145021531151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096907.

The product of its (nonzero) digits is 9000, while the sum is 33.

Adding to 31145021531151 its reverse (15113512054113), we get a palindrome (46258533585264).

The spelling of 31145021531151 in words is "thirty-one trillion, one hundred forty-five billion, twenty-one million, five hundred thirty-one thousand, one hundred fifty-one".