52212691 has 4 divisors (see below), whose sum is σ = 54482832. Its totient is φ = 49942552.

The previous prime is 52212653. The next prime is 52212697. The reversal of 52212691 is 19621225.

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 52212691 - 2¹⁵ = 52179923 is a prime.

It is a super-2 number, since 2×52212691² = 5452330202922962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52212697) 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, 1135036 + ... + 1135081.

It is an arithmetic number, because the mean of its divisors is an integer number (13620708).

Almost surely, 2^52212691 is an apocalyptic number.

52212691 is a deficient number, since it is larger than the sum of its proper divisors (2270141).

52212691 is a wasteful number, since it uses less digits than its factorization.

52212691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270140.

The product of its digits is 2160, while the sum is 28.

The square root of 52212691 is about 7225.8349690537. The cubic root of 52212691 is about 373.7593154354.

The spelling of 52212691 in words is "fifty-two million, two hundred twelve thousand, six hundred ninety-one".