51775779 has 24 divisors (see below), whose sum is σ = 79885120. Its totient is φ = 29723760.

The previous prime is 51775777. The next prime is 51775781. The reversal of 51775779 is 97757715.

It is an interprime number because it is at equal distance from previous prime (51775777) and next prime (51775781).

It is not a de Polignac number, because 51775779 - 2¹ = 51775777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51775771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3144 + ... + 10650.

Almost surely, 2^51775779 is an apocalyptic number.

51775779 is a deficient number, since it is larger than the sum of its proper divisors (28109341).

51775779 is a wasteful number, since it uses less digits than its factorization.

51775779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7551 (or 7540 counting only the distinct ones).

The product of its digits is 540225, while the sum is 48.

The square root of 51775779 is about 7195.5388262451. The cubic root of 51775779 is about 372.7138636479.

The spelling of 51775779 in words is "fifty-one million, seven hundred seventy-five thousand, seven hundred seventy-nine".