51427597 has 4 divisors (see below), whose sum is σ = 55383580. Its totient is φ = 47471616.

The previous prime is 51427589. The next prime is 51427603. The reversal of 51427597 is 79572415.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7946761 + 43480836 = 2819^2 + 6594^2 .

It is a cyclic number.

It is not a de Polignac number, because 51427597 - 2³ = 51427589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51427897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1977972 + ... + 1977997.

It is an arithmetic number, because the mean of its divisors is an integer number (13845895).

Almost surely, 2^51427597 is an apocalyptic number.

It is an amenable number.

51427597 is a deficient number, since it is larger than the sum of its proper divisors (3955983).

51427597 is a wasteful number, since it uses less digits than its factorization.

51427597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3955982.

The product of its digits is 88200, while the sum is 40.

The square root of 51427597 is about 7171.3037168983. The cubic root of 51427597 is about 371.8765078394.

The spelling of 51427597 in words is "fifty-one million, four hundred twenty-seven thousand, five hundred ninety-seven".