31041018 has 24 divisors (see below), whose sum is σ = 68897556. Its totient is φ = 10094400.

The previous prime is 31040983. The next prime is 31041019. The reversal of 31041018 is 81014013.

It can be written as a sum of positive squares in 2 ways, for example, as 30835809 + 205209 = 5553^2 + 453^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31041019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20293 + ... + 21768.

Almost surely, 2^31041018 is an apocalyptic number.

31041018 is an abundant number, since it is smaller than the sum of its proper divisors (37856538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31041018 is a wasteful number, since it uses less digits than its factorization.

31041018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42110 (or 42107 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 31041018 is about 5571.4466703003. The cubic root of 31041018 is about 314.2765559512.

It can be divided in two parts, 310 and 41018, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 31041018 in words is "thirty-one million, forty-one thousand, eighteen".