51522361 has 4 divisors (see below), whose sum is σ = 56206224. Its totient is φ = 46838500.

The previous prime is 51522349. The next prime is 51522371. The reversal of 51522361 is 16322515.

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 51522361 - 2⁵ = 51522329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51522311) 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, 2341915 + ... + 2341936.

It is an arithmetic number, because the mean of its divisors is an integer number (14051556).

Almost surely, 2^51522361 is an apocalyptic number.

It is an amenable number.

51522361 is a deficient number, since it is larger than the sum of its proper divisors (4683863).

51522361 is a wasteful number, since it uses less digits than its factorization.

51522361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4683862.

The product of its digits is 1800, while the sum is 25.

The square root of 51522361 is about 7177.9078428188. The cubic root of 51522361 is about 372.1047826960.

Adding to 51522361 its reverse (16322515), we get a palindrome (67844876).

The spelling of 51522361 in words is "fifty-one million, five hundred twenty-two thousand, three hundred sixty-one".