521423445 has 32 divisors (see below), whose sum is σ = 858211200. Its totient is φ = 270172160.

The previous prime is 521423423. The next prime is 521423449. The reversal of 521423445 is 544324125.

It is not a de Polignac number, because 521423445 - 2²¹ = 519326293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521423449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156406 + ... + 159704.

It is an arithmetic number, because the mean of its divisors is an integer number (26819100).

Almost surely, 2^521423445 is an apocalyptic number.

It is an amenable number.

521423445 is a deficient number, since it is larger than the sum of its proper divisors (336787755).

521423445 is a wasteful number, since it uses less digits than its factorization.

521423445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605.

The product of its digits is 19200, while the sum is 30.

The square root of 521423445 is about 22834.6982682058. The cubic root of 521423445 is about 804.8782373091.

The spelling of 521423445 in words is "five hundred twenty-one million, four hundred twenty-three thousand, four hundred forty-five".