31420100451252 has 12 divisors (see below), whose sum is σ = 73313567719616. Its totient is φ = 10473366817080.

The previous prime is 31420100451191. The next prime is 31420100451253. The reversal of 31420100451252 is 25215400102413.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×31420100451252² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420100451253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309170852124 + ... + 1309170852147.

Almost surely, 2^{31420100451252} is an apocalyptic number.

It is an amenable number.

31420100451252 is an abundant number, since it is smaller than the sum of its proper divisors (41893467268364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31420100451252 is a wasteful number, since it uses less digits than its factorization.

31420100451252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618341704278 (or 2618341704276 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 31420100451252 its reverse (25215400102413), we get a palindrome (56635500553665).

The spelling of 31420100451252 in words is "thirty-one trillion, four hundred twenty billion, one hundred million, four hundred fifty-one thousand, two hundred fifty-two".