31321027051 has 4 divisors (see below), whose sum is σ = 31346849392. Its totient is φ = 31295204712.

The previous prime is 31321027037. The next prime is 31321027099. The reversal of 31321027051 is 15072012313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15072012313 = 1063 ⋅14178751.

It is a cyclic number.

It is not a de Polignac number, because 31321027051 - 2³¹ = 29173543403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31321024051) 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, 12909351 + ... + 12911776.

It is an arithmetic number, because the mean of its divisors is an integer number (7836712348).

Almost surely, 2^31321027051 is an apocalyptic number.

31321027051 is a deficient number, since it is larger than the sum of its proper divisors (25822341).

31321027051 is a wasteful number, since it uses less digits than its factorization.

31321027051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25822340.

The product of its (nonzero) digits is 1260, while the sum is 25.

Adding to 31321027051 its reverse (15072012313), we get a palindrome (46393039364).

The spelling of 31321027051 in words is "thirty-one billion, three hundred twenty-one million, twenty-seven thousand, fifty-one".