51222337 has 4 divisors (see below), whose sum is σ = 51236800. Its totient is φ = 51207876.

The previous prime is 51222317. The next prime is 51222361. The reversal of 51222337 is 73322215.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51222337 - 2¹⁵ = 51189569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51222317) 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, 2068 + ... + 10330.

It is an arithmetic number, because the mean of its divisors is an integer number (12809200).

Almost surely, 2^51222337 is an apocalyptic number.

It is an amenable number.

51222337 is a deficient number, since it is larger than the sum of its proper divisors (14463).

51222337 is an equidigital number, since it uses as much as digits as its factorization.

51222337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14462.

The product of its digits is 2520, while the sum is 25.

The square root of 51222337 is about 7156.9782031246. The cubic root of 51222337 is about 371.3810984057.

The spelling of 51222337 in words is "fifty-one million, two hundred twenty-two thousand, three hundred thirty-seven".