31401431421378 has 32 divisors (see below), whose sum is σ = 62854681361472. Its totient is φ = 10458509510400.

The previous prime is 31401431421377. The next prime is 31401431421407. The reversal of 31401431421378 is 87312413410413.

It is a super-2 number, since 2×31401431421378² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31401431421377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59834758 + ... + 60357278.

It is an arithmetic number, because the mean of its divisors is an integer number (1964208792546).

Almost surely, 2^{31401431421378} is an apocalyptic number.

31401431421378 is an abundant number, since it is smaller than the sum of its proper divisors (31453249940094).

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

31401431421378 is a wasteful number, since it uses less digits than its factorization.

31401431421378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530770.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 31401431421378 in words is "thirty-one trillion, four hundred one billion, four hundred thirty-one million, four hundred twenty-one thousand, three hundred seventy-eight".