51819427 has 16 divisors (see below), whose sum is σ = 58309632. Its totient is φ = 45646720.

The previous prime is 51819409. The next prime is 51819431. The reversal of 51819427 is 72491815.

It is a cyclic number.

It is not a de Polignac number, because 51819427 - 2¹⁵ = 51786659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51819407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57978 + ... + 58864.

It is an arithmetic number, because the mean of its divisors is an integer number (3644352).

Almost surely, 2^51819427 is an apocalyptic number.

51819427 is a deficient number, since it is larger than the sum of its proper divisors (6490205).

51819427 is a wasteful number, since it uses less digits than its factorization.

51819427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058.

The product of its digits is 20160, while the sum is 37.

The square root of 51819427 is about 7198.5711776713. The cubic root of 51819427 is about 372.8185692696.

The spelling of 51819427 in words is "fifty-one million, eight hundred nineteen thousand, four hundred twenty-seven".