51222398 has 8 divisors (see below), whose sum is σ = 77551992. Its totient is φ = 25371736.

The previous prime is 51222397. The next prime is 51222419. The reversal of 51222398 is 89322215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51222397) 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, 119465 + ... + 119892.

It is an arithmetic number, because the mean of its divisors is an integer number (9693999).

Almost surely, 2^51222398 is an apocalyptic number.

51222398 is a deficient number, since it is larger than the sum of its proper divisors (26329594).

51222398 is a wasteful number, since it uses less digits than its factorization.

51222398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239466.

The product of its digits is 8640, while the sum is 32.

The square root of 51222398 is about 7156.9824646984. The cubic root of 51222398 is about 371.3812458299.

The spelling of 51222398 in words is "fifty-one million, two hundred twenty-two thousand, three hundred ninety-eight".