31479855 has 16 divisors (see below), whose sum is σ = 54946944. Its totient is φ = 15262880.

The previous prime is 31479829. The next prime is 31479857. The reversal of 31479855 is 55897413.

It is not a de Polignac number, because 31479855 - 2¹⁰ = 31478831 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31479857) 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, 95229 + ... + 95558.

It is an arithmetic number, because the mean of its divisors is an integer number (3434184).

Almost surely, 2^31479855 is an apocalyptic number.

31479855 is a deficient number, since it is larger than the sum of its proper divisors (23467089).

31479855 is a wasteful number, since it uses less digits than its factorization.

31479855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190806.

The product of its digits is 151200, while the sum is 42.

The square root of 31479855 is about 5610.6911338979. The cubic root of 31479855 is about 315.7506411533.

The spelling of 31479855 in words is "thirty-one million, four hundred seventy-nine thousand, eight hundred fifty-five".