31142023040 has 32 divisors (see below), whose sum is σ = 74448900360. Its totient is φ = 12456808960.

The previous prime is 31142023037. The next prime is 31142023049. The reversal of 31142023040 is 4032024113.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142023049) 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, 24329066 + ... + 24330345.

Almost surely, 2^31142023040 is an apocalyptic number.

It is an amenable number.

31142023040 is an abundant number, since it is smaller than the sum of its proper divisors (43306877320).

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

31142023040 is an equidigital number, since it uses as much as digits as its factorization.

31142023040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48659430 (or 48659418 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31142023040 its reverse (4032024113), we get a palindrome (35174047153).

The spelling of 31142023040 in words is "thirty-one billion, one hundred forty-two million, twenty-three thousand, forty".