521231314426 has 24 divisors (see below), whose sum is σ = 818559624960. Its totient is φ = 248905931736.

The previous prime is 521231314423. The next prime is 521231314493. The reversal of 521231314426 is 624413132125.

It is a junction number, because it is equal to n+sod(n) for n = 521231314391 and 521231314400.

It is not an unprimeable number, because it can be changed into a prime (521231314423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 323431 + ... + 1071013.

It is an arithmetic number, because the mean of its divisors is an integer number (34106651040).

Almost surely, 2^521231314426 is an apocalyptic number.

521231314426 is a deficient number, since it is larger than the sum of its proper divisors (297328310534).

521231314426 is a wasteful number, since it uses less digits than its factorization.

521231314426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748290 (or 748267 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The spelling of 521231314426 in words is "five hundred twenty-one billion, two hundred thirty-one million, three hundred fourteen thousand, four hundred twenty-six".