31272731406 has 48 divisors (see below), whose sum is σ = 77466939264. Its totient is φ = 8931639312.

The previous prime is 31272731387. The next prime is 31272731407. The reversal of 31272731406 is 60413727213.

31272731406 is a `hidden beast` number, since 312 + 7 + 27 + 314 + 0 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31272731407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291805 + ... + 384311.

It is an arithmetic number, because the mean of its divisors is an integer number (1613894568).

Almost surely, 2^31272731406 is an apocalyptic number.

31272731406 is an abundant number, since it is smaller than the sum of its proper divisors (46194207858).

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

31272731406 is a wasteful number, since it uses less digits than its factorization.

31272731406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95205 (or 95202 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The spelling of 31272731406 in words is "thirty-one billion, two hundred seventy-two million, seven hundred thirty-one thousand, four hundred six".