31379042 has 18 divisors (see below), whose sum is σ = 50215683. Its totient is φ = 14703232.

The previous prime is 31379041. The next prime is 31379057. The reversal of 31379042 is 24097313.

It can be written as a sum of positive squares in 5 ways, for example, as 14984641 + 16394401 = 3871^2 + 4049^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3961.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31378996 and 31379014.

It is not an unprimeable number, because it can be changed into a prime (31379041) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 134558 + ... + 134790.

Almost surely, 2^31379042 is an apocalyptic number.

31379042 is a deficient number, since it is larger than the sum of its proper divisors (18836641).

31379042 is an equidigital number, since it uses as much as digits as its factorization.

31379042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 31379042 is about 5601.6999205598. The cubic root of 31379042 is about 315.4132210268.

It can be divided in two parts, 3 and 1379042, that multiplied together give a triangular number (4137126 = T₂₈₇₆).

The spelling of 31379042 in words is "thirty-one million, three hundred seventy-nine thousand, forty-two".