31361428140 has 48 divisors (see below), whose sum is σ = 100356571392. Its totient is φ = 7168326336.

The previous prime is 31361428103. The next prime is 31361428157. The reversal of 31361428140 is 4182416313.

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, 37334614 + ... + 37335453.

It is an arithmetic number, because the mean of its divisors is an integer number (2090761904).

Almost surely, 2^31361428140 is an apocalyptic number.

31361428140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31361428140 is an abundant number, since it is smaller than the sum of its proper divisors (68995143252).

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

31361428140 is a wasteful number, since it uses less digits than its factorization.

31361428140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74670086 (or 74670084 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 31361428140 in words is "thirty-one billion, three hundred sixty-one million, four hundred twenty-eight thousand, one hundred forty".