31090233478 has 4 divisors (see below), whose sum is σ = 46635350220. Its totient is φ = 15545116738.

The previous prime is 31090233451. The next prime is 31090233479. The reversal of 31090233478 is 87433209013.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31090233478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31090233479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7772558368 + ... + 7772558371.

It is an arithmetic number, because the mean of its divisors is an integer number (11658837555).

Almost surely, 2^31090233478 is an apocalyptic number.

31090233478 is a deficient number, since it is larger than the sum of its proper divisors (15545116742).

31090233478 is a wasteful number, since it uses less digits than its factorization.

31090233478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15545116741.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 31090233478 in words is "thirty-one billion, ninety million, two hundred thirty-three thousand, four hundred seventy-eight".