52492781 has 4 divisors (see below), whose sum is σ = 57264864. Its totient is φ = 47720700.

The previous prime is 52492777. The next prime is 52492789. The reversal of 52492781 is 18729425.

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 52492781 - 2² = 52492777 is a prime.

It is a super-2 number, since 2×52492781² = 5510984114227922, which contains 22 as substring.

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 (52492789) 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, 2386025 + ... + 2386046.

It is an arithmetic number, because the mean of its divisors is an integer number (14316216).

Almost surely, 2^52492781 is an apocalyptic number.

It is an amenable number.

52492781 is a deficient number, since it is larger than the sum of its proper divisors (4772083).

52492781 is a wasteful number, since it uses less digits than its factorization.

52492781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4772082.

The product of its digits is 40320, while the sum is 38.

The square root of 52492781 is about 7245.1901976415. The cubic root of 52492781 is about 374.4264559806.

The spelling of 52492781 in words is "fifty-two million, four hundred ninety-two thousand, seven hundred eighty-one".