31401023340 has 144 divisors (see below), whose sum is σ = 93698325504. Its totient is φ = 7855795200.

The previous prime is 31401023333. The next prime is 31401023363. The reversal of 31401023340 is 4332010413.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5736805 + ... + 5742275.

It is an arithmetic number, because the mean of its divisors is an integer number (650682816).

Almost surely, 2^31401023340 is an apocalyptic number.

31401023340 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 31401023340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46849162752).

31401023340 is an abundant number, since it is smaller than the sum of its proper divisors (62297302164).

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

31401023340 is a wasteful number, since it uses less digits than its factorization.

31401023340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5848 (or 5829 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31401023340 its reverse (4332010413), we get a palindrome (35733033753).

The spelling of 31401023340 in words is "thirty-one billion, four hundred one million, twenty-three thousand, three hundred forty".