231513454351550 has 24 divisors (see below), whose sum is σ = 492131457250896. Its totient is φ = 79376041491840.

The previous prime is 231513454351549. The next prime is 231513454351567. The reversal of 231513454351550 is 55153454315132.

It is a junction number, because it is equal to n+sod(n) for n = 231513454351495 and 231513454351504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330733505867 + ... + 330733506566.

It is an arithmetic number, because the mean of its divisors is an integer number (20505477385454).

Almost surely, 2^{231513454351550} is an apocalyptic number.

231513454351550 is an abundant number, since it is smaller than the sum of its proper divisors (260618002899346).

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

231513454351550 is a wasteful number, since it uses less digits than its factorization.

231513454351550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661467012452 (or 661467012447 counting only the distinct ones).

The product of its (nonzero) digits is 2700000, while the sum is 47.

The spelling of 231513454351550 in words is "two hundred thirty-one trillion, five hundred thirteen billion, four hundred fifty-four million, three hundred fifty-one thousand, five hundred fifty".