31003203040 has 24 divisors (see below), whose sum is σ = 73245067560. Its totient is φ = 12401281152.

The previous prime is 31003203031. The next prime is 31003203041. The reversal of 31003203040 is 4030230013.

It is a super-2 number, since 2×31003203040² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31003203041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96884850 + ... + 96885169.

It is an arithmetic number, because the mean of its divisors is an integer number (3051877815).

Almost surely, 2^31003203040 is an apocalyptic number.

It is an amenable number.

31003203040 is an abundant number, since it is smaller than the sum of its proper divisors (42241864520).

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

31003203040 is a wasteful number, since it uses less digits than its factorization.

31003203040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193770034 (or 193770026 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 31003203040 its reverse (4030230013), we get a palindrome (35033433053).

The spelling of 31003203040 in words is "thirty-one billion, three million, two hundred three thousand, forty".