31138881094 has 8 divisors (see below), whose sum is σ = 46715046768. Its totient is φ = 15567198840.

The previous prime is 31138881091. The next prime is 31138881107. The reversal of 31138881094 is 49018883113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31138881091) 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, 1103437 + ... + 1131304.

It is an arithmetic number, because the mean of its divisors is an integer number (5839380846).

Almost surely, 2^31138881094 is an apocalyptic number.

31138881094 is a deficient number, since it is larger than the sum of its proper divisors (15576165674).

31138881094 is a wasteful number, since it uses less digits than its factorization.

31138881094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241710.

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 31138881094 in words is "thirty-one billion, one hundred thirty-eight million, eight hundred eighty-one thousand, ninety-four".