51222051 has 10 divisors (see below), whose sum is σ = 76517012. Its totient is φ = 34147980.

The previous prime is 51222047. The next prime is 51222107. The reversal of 51222051 is 15022215.

It is not a de Polignac number, because 51222051 - 2² = 51222047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51222001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 316105 + ... + 316266.

Almost surely, 2^51222051 is an apocalyptic number.

51222051 is a deficient number, since it is larger than the sum of its proper divisors (25294961).

51222051 is an equidigital number, since it uses as much as digits as its factorization.

51222051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632383 (or 632374 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51222051 is about 7156.9582225971. The cubic root of 51222051 is about 371.3804072021.

Adding to 51222051 its reverse (15022215), we get a palindrome (66244266).

The spelling of 51222051 in words is "fifty-one million, two hundred twenty-two thousand, fifty-one".