31406644051 has 4 divisors (see below), whose sum is σ = 31501528504. Its totient is φ = 31311759600.

The previous prime is 31406643979. The next prime is 31406644057. The reversal of 31406644051 is 15044660413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31406644051 - 2¹⁷ = 31406512979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31406643998 and 31406644016.

It is not an unprimeable number, because it can be changed into a prime (31406644057) 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, 47441730 + ... + 47442391.

It is an arithmetic number, because the mean of its divisors is an integer number (7875382126).

Almost surely, 2^31406644051 is an apocalyptic number.

31406644051 is a deficient number, since it is larger than the sum of its proper divisors (94884453).

31406644051 is an equidigital number, since it uses as much as digits as its factorization.

31406644051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94884452.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 31406644051 in words is "thirty-one billion, four hundred six million, six hundred forty-four thousand, fifty-one".