31010156042 has 24 divisors (see below), whose sum is σ = 51560762976. Its totient is φ = 13958529728.

The previous prime is 31010156041. The next prime is 31010156087. The reversal of 31010156042 is 24065101013.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 31010155999 and 31010156017.

It is not an unprimeable number, because it can be changed into a prime (31010156041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1153028 + ... + 1179615.

It is an arithmetic number, because the mean of its divisors is an integer number (2148365124).

Almost surely, 2^31010156042 is an apocalyptic number.

31010156042 is a deficient number, since it is larger than the sum of its proper divisors (20550606934).

31010156042 is a wasteful number, since it uses less digits than its factorization.

31010156042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332702 (or 2332685 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 31010156042 its reverse (24065101013), we get a palindrome (55075257055).

The spelling of 31010156042 in words is "thirty-one billion, ten million, one hundred fifty-six thousand, forty-two".