51822231 has 4 divisors (see below), whose sum is σ = 69096312. Its totient is φ = 34548152.

The previous prime is 51822227. The next prime is 51822263. The reversal of 51822231 is 13222815.

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 51822231 - 2² = 51822227 is a prime.

It is a super-2 number, since 2×51822231² = 5371087251634722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51822431) 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, 8637036 + ... + 8637041.

It is an arithmetic number, because the mean of its divisors is an integer number (17274078).

Almost surely, 2^51822231 is an apocalyptic number.

51822231 is a deficient number, since it is larger than the sum of its proper divisors (17274081).

51822231 is a wasteful number, since it uses less digits than its factorization.

51822231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17274080.

The product of its digits is 960, while the sum is 24.

The square root of 51822231 is about 7198.7659359087. The cubic root of 51822231 is about 372.8252936744.

The spelling of 51822231 in words is "fifty-one million, eight hundred twenty-two thousand, two hundred thirty-one".