31331307093 has 16 divisors (see below), whose sum is σ = 42181823040. Its totient is φ = 20684923776.

The previous prime is 31331307079. The next prime is 31331307101. The reversal of 31331307093 is 39070313313.

It is a de Polignac number, because none of the positive numbers 2^k-31331307093 is a prime.

It is a super-2 number, since 2×31331307093² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331307053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70921 + ... + 260177.

It is an arithmetic number, because the mean of its divisors is an integer number (2636363940).

Almost surely, 2^31331307093 is an apocalyptic number.

It is an amenable number.

31331307093 is a deficient number, since it is larger than the sum of its proper divisors (10850515947).

31331307093 is a wasteful number, since it uses less digits than its factorization.

31331307093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189796.

The product of its (nonzero) digits is 15309, while the sum is 33.

The spelling of 31331307093 in words is "thirty-one billion, three hundred thirty-one million, three hundred seven thousand, ninety-three".