402052523 has 4 divisors (see below), whose sum is σ = 410606880. Its totient is φ = 393498168.

The previous prime is 402052513. The next prime is 402052579. The reversal of 402052523 is 325250204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402052523 - 2⁶ = 402052459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402052513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4277108 + ... + 4277201.

It is an arithmetic number, because the mean of its divisors is an integer number (102651720).

Almost surely, 2^402052523 is an apocalyptic number.

402052523 is a deficient number, since it is larger than the sum of its proper divisors (8554357).

402052523 is an equidigital number, since it uses as much as digits as its factorization.

402052523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8554356.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 402052523 is about 20051.2474175548. The cubic root of 402052523 is about 738.0644101557.

The spelling of 402052523 in words is "four hundred two million, fifty-two thousand, five hundred twenty-three".