31431012078 has 16 divisors (see below), whose sum is σ = 62864237520. Its totient is φ = 10476635136.

The previous prime is 31431012077. The next prime is 31431012079. The reversal of 31431012078 is 87021013413.

It is an interprime number because it is at equal distance from previous prime (31431012077) and next prime (31431012079).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431012077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135726 + ... + 285102.

It is an arithmetic number, because the mean of its divisors is an integer number (3929014845).

Almost surely, 2^31431012078 is an apocalyptic number.

31431012078 is an abundant number, since it is smaller than the sum of its proper divisors (31433225442).

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

31431012078 is a wasteful number, since it uses less digits than its factorization.

31431012078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184451.

The product of its (nonzero) digits is 4032, while the sum is 30.

The spelling of 31431012078 in words is "thirty-one billion, four hundred thirty-one million, twelve thousand, seventy-eight".