52051691 has 4 divisors (see below), whose sum is σ = 54314832. Its totient is φ = 49788552.

The previous prime is 52051687. The next prime is 52051693. The reversal of 52051691 is 19615025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52051691 - 2² = 52051687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52051693) 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, 1131536 + ... + 1131581.

It is an arithmetic number, because the mean of its divisors is an integer number (13578708).

Almost surely, 2^52051691 is an apocalyptic number.

52051691 is a deficient number, since it is larger than the sum of its proper divisors (2263141).

52051691 is a wasteful number, since it uses less digits than its factorization.

52051691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263140.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 52051691 is about 7214.6857866438. The cubic root of 52051691 is about 373.3747524376.

The spelling of 52051691 in words is "fifty-two million, fifty-one thousand, six hundred ninety-one".