31431385843260 has 192 divisors, whose sum is σ = 95850349176960. Its totient is φ = 7649729740800.

The previous prime is 31431385843243. The next prime is 31431385843331. The reversal of 31431385843260 is 6234858313413.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35613310 + ... + 36485210.

It is an arithmetic number, because the mean of its divisors is an integer number (499220568630).

Almost surely, 2^{31431385843260} is an apocalyptic number.

31431385843260 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31431385843260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47925174588480).

31431385843260 is an abundant number, since it is smaller than the sum of its proper divisors (64418963333700).

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

31431385843260 is a wasteful number, since it uses less digits than its factorization.

31431385843260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872448 (or 872446 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 51.

The spelling of 31431385843260 in words is "thirty-one trillion, four hundred thirty-one billion, three hundred eighty-five million, eight hundred forty-three thousand, two hundred sixty".