31152040253421 has 8 divisors (see below), whose sum is σ = 41536116763680. Its totient is φ = 20767995289392.

The previous prime is 31152040253387. The next prime is 31152040253437. The reversal of 31152040253421 is 12435204025113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31152040253421 - 2⁷ = 31152040253293 is a prime.

It is a super-5 number, since 5×31152040253421⁵ (a number of 69 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31152040253461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5477230 + ... + 9607503.

It is an arithmetic number, because the mean of its divisors is an integer number (5192014595460).

Almost surely, 2^{31152040253421} is an apocalyptic number.

It is an amenable number.

31152040253421 is a deficient number, since it is larger than the sum of its proper divisors (10384076510259).

31152040253421 is a wasteful number, since it uses less digits than its factorization.

31152040253421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15773115.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 31152040253421 its reverse (12435204025113), we get a palindrome (43587244278534).

The spelling of 31152040253421 in words is "thirty-one trillion, one hundred fifty-two billion, forty million, two hundred fifty-three thousand, four hundred twenty-one".