31323000140 has 48 divisors (see below), whose sum is σ = 69951924000. Its totient is φ = 11740664832.

The previous prime is 31323000077. The next prime is 31323000151. The reversal of 31323000140 is 4100032313.

It is a happy number.

It is a super-2 number, since 2×31323000140² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 123290 + ... + 279009.

It is an arithmetic number, because the mean of its divisors is an integer number (1457331750).

Almost surely, 2^31323000140 is an apocalyptic number.

It is an amenable number.

31323000140 is an abundant number, since it is smaller than the sum of its proper divisors (38628923860).

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

31323000140 is a wasteful number, since it uses less digits than its factorization.

31323000140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402554 (or 402552 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31323000140 its reverse (4100032313), we get a palindrome (35423032453).

The spelling of 31323000140 in words is "thirty-one billion, three hundred twenty-three million, one hundred forty", and thus it is an aban number.