523661567 has 16 divisors (see below), whose sum is σ = 615861792. Its totient is φ = 438971520.

The previous prime is 523661561. The next prime is 523661569. The reversal of 523661567 is 765166325.

It is not a de Polignac number, because 523661567 - 2¹⁴ = 523645183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523661561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232973 + ... + 235209.

It is an arithmetic number, because the mean of its divisors is an integer number (38491362).

Almost surely, 2^523661567 is an apocalyptic number.

523661567 is a deficient number, since it is larger than the sum of its proper divisors (92200225).

523661567 is a wasteful number, since it uses less digits than its factorization.

523661567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3898.

The product of its digits is 226800, while the sum is 41.

The square root of 523661567 is about 22883.6528334093. The cubic root of 523661567 is about 806.0281948033.

The spelling of 523661567 in words is "five hundred twenty-three million, six hundred sixty-one thousand, five hundred sixty-seven".