731981202481 has 27 divisors (see below), whose sum is σ = 791902657281. Its totient is φ = 676452856704.

The previous prime is 731981202473. The next prime is 731981202499. The reversal of 731981202481 is 184202189137.

The square root of 731981202481 is 855559.

It is a perfect power (a square), and thus also a powerful number.

731981202481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 43844590881 + 688136611600 = 209391^2 + 829540^2 .

It is not a de Polignac number, because 731981202481 - 2³ = 731981202473 is a prime.

It is a super-2 number, since 2×731981202481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731981202431) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 858125251 + ... + 858126103.

Almost surely, 2^731981202481 is an apocalyptic number.

731981202481 is the 855559-th square number.

731981202481 is the 427780-th centered octagonal number.

It is an amenable number.

731981202481 is a deficient number, since it is larger than the sum of its proper divisors (59921454800).

731981202481 is an frugal number, since it uses more digits than its factorization.

731981202481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 731981202481 in words is "seven hundred thirty-one billion, nine hundred eighty-one million, two hundred two thousand, four hundred eighty-one".