31020200040 has 64 divisors (see below), whose sum is σ = 94238611200. Its totient is φ = 8167341312.

The previous prime is 31020200023. The next prime is 31020200047. The reversal of 31020200040 is 4000202013.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 31020199989 and 31020200025.

It is not an unprimeable number, because it can be changed into a prime (31020200047) 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 15 ways as a sum of consecutive naturals, for example, 1626607 + ... + 1645566.

It is an arithmetic number, because the mean of its divisors is an integer number (1472478300).

Almost surely, 2^31020200040 is an apocalyptic number.

31020200040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31020200040 is an abundant number, since it is smaller than the sum of its proper divisors (63218411160).

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

31020200040 is a wasteful number, since it uses less digits than its factorization.

31020200040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272266 (or 3272262 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 31020200040 its reverse (4000202013), we get a palindrome (35020402053).

The spelling of 31020200040 in words is "thirty-one billion, twenty million, two hundred thousand, forty".