31350121231513 has 16 divisors (see below), whose sum is σ = 35851069900800. Its totient is φ = 26854765520400.

The previous prime is 31350121231493. The next prime is 31350121231543. The reversal of 31350121231513 is 31513212105313.

It is a cyclic number.

It is not a de Polignac number, because 31350121231513 - 2²¹ = 31350119134361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31350121231543) 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, 132497088 + ... + 132733486.

It is an arithmetic number, because the mean of its divisors is an integer number (2240691868800).

Almost surely, 2^{31350121231513} is an apocalyptic number.

It is an amenable number.

31350121231513 is a deficient number, since it is larger than the sum of its proper divisors (4500948669287).

31350121231513 is a wasteful number, since it uses less digits than its factorization.

31350121231513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248148.

The product of its (nonzero) digits is 8100, while the sum is 31.

Adding to 31350121231513 its reverse (31513212105313), we get a palindrome (62863333336826).

The spelling of 31350121231513 in words is "thirty-one trillion, three hundred fifty billion, one hundred twenty-one million, two hundred thirty-one thousand, five hundred thirteen".