31115143100 has 18 divisors (see below), whose sum is σ = 67519860744. Its totient is φ = 12446057200.

The previous prime is 31115143099. The next prime is 31115143117. The reversal of 31115143100 is 134151113.

It is a super-2 number, since 2×31115143100² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155575616 + ... + 155575815.

Almost surely, 2^31115143100 is an apocalyptic number.

It is an amenable number.

31115143100 is an abundant number, since it is smaller than the sum of its proper divisors (36404717644).

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

31115143100 is a wasteful number, since it uses less digits than its factorization.

31115143100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311151445 (or 311151438 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 31115143100 its reverse (134151113), we get a palindrome (31249294213).

The spelling of 31115143100 in words is "thirty-one billion, one hundred fifteen million, one hundred forty-three thousand, one hundred".