31415051321 has 4 divisors (see below), whose sum is σ = 31883932752. Its totient is φ = 30946169892.

The previous prime is 31415051303. The next prime is 31415051341. The reversal of 31415051321 is 12315051413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31415051321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31415051341) 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, 234440615 + ... + 234440748.

It is an arithmetic number, because the mean of its divisors is an integer number (7970983188).

Almost surely, 2^31415051321 is an apocalyptic number.

It is an amenable number.

31415051321 is a deficient number, since it is larger than the sum of its proper divisors (468881431).

31415051321 is an equidigital number, since it uses as much as digits as its factorization.

31415051321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468881430.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 31415051321 in words is "thirty-one billion, four hundred fifteen million, fifty-one thousand, three hundred twenty-one".