52406213 has 12 divisors (see below), whose sum is σ = 56529504. Its totient is φ = 48490200.

The previous prime is 52406209. The next prime is 52406227. The reversal of 52406213 is 31260425.

It is not a de Polignac number, because 52406213 - 2² = 52406209 is a prime.

It is a super-2 number, since 2×52406213² = 5492822322002738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52406203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20918 + ... + 23288.

It is an arithmetic number, because the mean of its divisors is an integer number (4710792).

Almost surely, 2^52406213 is an apocalyptic number.

It is an amenable number.

52406213 is a deficient number, since it is larger than the sum of its proper divisors (4123291).

52406213 is a wasteful number, since it uses less digits than its factorization.

52406213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456 (or 2425 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 52406213 is about 7239.2135622594. The cubic root of 52406213 is about 374.2205153844.

Adding to 52406213 its reverse (31260425), we get a palindrome (83666638).

The spelling of 52406213 in words is "fifty-two million, four hundred six thousand, two hundred thirteen".