52535402421 has 16 divisors (see below), whose sum is σ = 70724596800. Its totient is φ = 34685221248.

The previous prime is 52535402407. The next prime is 52535402443. The reversal of 52535402421 is 12420453525.

It is a happy number.

It is not a de Polignac number, because 52535402421 - 2⁵ = 52535402389 is a prime.

It is a super-2 number, since 2×52535402421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52535402461) 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, 644650 + ... + 721556.

It is an arithmetic number, because the mean of its divisors is an integer number (4420287300).

Almost surely, 2^52535402421 is an apocalyptic number.

It is an amenable number.

52535402421 is a deficient number, since it is larger than the sum of its proper divisors (18189194379).

52535402421 is a wasteful number, since it uses less digits than its factorization.

52535402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79108.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 52535402421 its reverse (12420453525), we get a palindrome (64955855946).

The spelling of 52535402421 in words is "fifty-two billion, five hundred thirty-five million, four hundred two thousand, four hundred twenty-one".