31011002040 has 64 divisors (see below), whose sum is σ = 93167890560. Its totient is φ = 8257610880.

The previous prime is 31011002027. The next prime is 31011002083. The reversal of 31011002040 is 4020011013.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104074 + ... + 269913.

It is an arithmetic number, because the mean of its divisors is an integer number (1455748290).

Almost surely, 2^31011002040 is an apocalyptic number.

31011002040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31011002040 is an abundant number, since it is smaller than the sum of its proper divisors (62156888520).

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

31011002040 is a wasteful number, since it uses less digits than its factorization.

31011002040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374692 (or 374688 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 31011002040 its reverse (4020011013), we get a palindrome (35031013053).

The spelling of 31011002040 in words is "thirty-one billion, eleven million, two thousand, forty".