31081337401 has 3 divisors (see below), whose sum is σ = 31081513701. Its totient is φ = 31081161102.

The previous prime is 31081337383. The next prime is 31081337461. The reversal of 31081337401 is 10473318013.

The square root of 31081337401 is 176299.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 31081337401 - 2⁵ = 31081337369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31081337461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 88150 + ... + 264448.

It is an arithmetic number, because the mean of its divisors is an integer number (10360504567).

Almost surely, 2^31081337401 is an apocalyptic number.

31081337401 is the 176299-th square number.

31081337401 is the 88150-th centered octagonal number.

It is an amenable number.

31081337401 is a deficient number, since it is larger than the sum of its proper divisors (176300).

31081337401 is an frugal number, since it uses more digits than its factorization.

31081337401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352598 (or 176299 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 31081337401 in words is "thirty-one billion, eighty-one million, three hundred thirty-seven thousand, four hundred one".