51430228 has 6 divisors (see below), whose sum is σ = 90002906. Its totient is φ = 25715112.

The previous prime is 51430213. The next prime is 51430237. The reversal of 51430228 is 82203415.

It can be written as a sum of positive squares in only one way, i.e., 37307664 + 14122564 = 6108^2 + 3758^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6428775 + ... + 6428782.

Almost surely, 2^51430228 is an apocalyptic number.

It is an amenable number.

51430228 is a deficient number, since it is larger than the sum of its proper divisors (38572678).

51430228 is a wasteful number, since it uses less digits than its factorization.

51430228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12857561 (or 12857559 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 51430228 is about 7171.4871540009. The cubic root of 51430228 is about 371.8828493788.

The spelling of 51430228 in words is "fifty-one million, four hundred thirty thousand, two hundred twenty-eight".