4232520321481 has 3 divisors (see below), whose sum is σ = 4232522378791. Its totient is φ = 4232518264172.

The previous prime is 4232520321451. The next prime is 4232520321529. The reversal of 4232520321481 is 1841230252324.

The square root of 4232520321481 is 2057309.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 716970321081 + 3515550000400 = 846741^2 + 1874980^2 .

It is not a de Polignac number, because 4232520321481 - 2²¹ = 4232518224329 is a prime.

It is a super-2 number, since 2×4232520321481² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4232520321481.

It is not an unprimeable number, because it can be changed into a prime (4232520321451) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1028655 + ... + 3085963.

Almost surely, 2^{4232520321481} is an apocalyptic number.

4232520321481 is the 2057309-th square number.

4232520321481 is the 1028655-th centered octagonal number.

It is an amenable number.

4232520321481 is a deficient number, since it is larger than the sum of its proper divisors (2057310).

4232520321481 is an frugal number, since it uses more digits than its factorization.

4232520321481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4114618 (or 2057309 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 4232520321481 in words is "four trillion, two hundred thirty-two billion, five hundred twenty million, three hundred twenty-one thousand, four hundred eighty-one".