52999681 has 4 divisors (see below), whose sum is σ = 60571072. Its totient is φ = 45428292.

The previous prime is 52999663. The next prime is 52999697. The reversal of 52999681 is 18699925.

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 not a de Polignac number, because 52999681 - 2¹⁵ = 52966913 is a prime.

It is a super-2 number, since 2×52999681² = 5617932372203522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52999631) 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, 3785685 + ... + 3785698.

It is an arithmetic number, because the mean of its divisors is an integer number (15142768).

Almost surely, 2^52999681 is an apocalyptic number.

It is an amenable number.

52999681 is a deficient number, since it is larger than the sum of its proper divisors (7571391).

52999681 is an equidigital number, since it uses as much as digits as its factorization.

52999681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7571390.

The product of its digits is 349920, while the sum is 49.

The square root of 52999681 is about 7280.0879802376. The cubic root of 52999681 is about 375.6278218010.

The spelling of 52999681 in words is "fifty-two million, nine hundred ninety-nine thousand, six hundred eighty-one".