51128415 has 84 divisors (see below), whose sum is σ = 100809576. Its totient is φ = 24867648.

The previous prime is 51128381. The next prime is 51128447. The reversal of 51128415 is 51482115.

It is not a de Polignac number, because 51128415 - 2⁸ = 51128159 is a prime.

It is a super-2 number, since 2×51128415² = 5228229640824450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 615964 + ... + 616046.

It is an arithmetic number, because the mean of its divisors is an integer number (1200114).

Almost surely, 2^51128415 is an apocalyptic number.

51128415 is a deficient number, since it is larger than the sum of its proper divisors (49681161).

51128415 is an equidigital number, since it uses as much as digits as its factorization.

51128415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 104 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 51128415 is about 7150.4136243996. The cubic root of 51128415 is about 371.1539696526.

The spelling of 51128415 in words is "fifty-one million, one hundred twenty-eight thousand, four hundred fifteen".