52405731 has 16 divisors (see below), whose sum is σ = 88729600. Its totient is φ = 29946024.

The previous prime is 52405723. The next prime is 52405741. The reversal of 52405731 is 13750425.

It is a happy number.

52405731 is a `hidden beast` number, since 52 + 40 + 573 + 1 = 666.

It is not a de Polignac number, because 52405731 - 2³ = 52405723 is a prime.

It is a super-2 number, since 2×52405731² = 5492721283288722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52405695 and 52405704.

It is not an unprimeable number, because it can be changed into a prime (52405741) 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, 138451 + ... + 138828.

It is an arithmetic number, because the mean of its divisors is an integer number (5545600).

Almost surely, 2^52405731 is an apocalyptic number.

52405731 is a deficient number, since it is larger than the sum of its proper divisors (36323869).

52405731 is a wasteful number, since it uses less digits than its factorization.

52405731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277295 (or 277289 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 52405731 is about 7239.1802712738. The cubic root of 52405731 is about 374.2193680978.

The spelling of 52405731 in words is "fifty-two million, four hundred five thousand, seven hundred thirty-one".