52400581 has 4 divisors (see below), whose sum is σ = 52813312. Its totient is φ = 51987852.

The previous prime is 52400573. The next prime is 52400591. The reversal of 52400581 is 18500425.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52400581 - 2³ = 52400573 is a prime.

It is a super-2 number, since 2×52400581² = 5491641778275122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52400521) 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, 206175 + ... + 206428.

It is an arithmetic number, because the mean of its divisors is an integer number (13203328).

Almost surely, 2^52400581 is an apocalyptic number.

It is an amenable number.

52400581 is a deficient number, since it is larger than the sum of its proper divisors (412731).

52400581 is a wasteful number, since it uses less digits than its factorization.

52400581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412730.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 52400581 is about 7238.8245592776. The cubic root of 52400581 is about 374.2071093057.

The spelling of 52400581 in words is "fifty-two million, four hundred thousand, five hundred eighty-one".