51228427 has 6 divisors (see below), whose sum is σ = 54066948. Its totient is φ = 48531852.

The previous prime is 51228409. The next prime is 51228431. The reversal of 51228427 is 72482215.

It is a happy number.

It is not a de Polignac number, because 51228427 - 2⁷ = 51228299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51228127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70593 + ... + 71314.

It is an arithmetic number, because the mean of its divisors is an integer number (9011158).

Almost surely, 2^51228427 is an apocalyptic number.

51228427 is a deficient number, since it is larger than the sum of its proper divisors (2838521).

51228427 is a wasteful number, since it uses less digits than its factorization.

51228427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141945 (or 141926 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 51228427 is about 7157.4036493690. The cubic root of 51228427 is about 371.3958160816.

The spelling of 51228427 in words is "fifty-one million, two hundred twenty-eight thousand, four hundred twenty-seven".