31421115662013 has 80 divisors (see below), whose sum is σ = 59511610667520. Its totient is φ = 16046002087200.

The previous prime is 31421115662009. The next prime is 31421115662017. The reversal of 31421115662013 is 31026651112413.

31421115662013 is a `hidden beast` number, since 3 + 1 + 4 + 2 + 1 + 1 + 15 + 6 + 620 + 13 = 666.

It is an interprime number because it is at equal distance from previous prime (31421115662009) and next prime (31421115662017).

It is not a de Polignac number, because 31421115662013 - 2² = 31421115662009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421115662017) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 42325723 + ... + 43061688.

It is an arithmetic number, because the mean of its divisors is an integer number (743895133344).

Almost surely, 2^{31421115662013} is an apocalyptic number.

31421115662013 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31421115662013 is a deficient number, since it is larger than the sum of its proper divisors (28090495005507).

31421115662013 is a wasteful number, since it uses less digits than its factorization.

31421115662013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85387500 (or 85387491 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

Adding to 31421115662013 its reverse (31026651112413), we get a palindrome (62447766774426).

The spelling of 31421115662013 in words is "thirty-one trillion, four hundred twenty-one billion, one hundred fifteen million, six hundred sixty-two thousand, thirteen".