51105415 has 4 divisors (see below), whose sum is σ = 61326504. Its totient is φ = 40884328.

The previous prime is 51105367. The next prime is 51105443. The reversal of 51105415 is 51450115.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51105415 - 2²⁵ = 17550983 is a prime.

It is a super-2 number, since 2×51105415² = 5223526884644450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5110537 + ... + 5110546.

It is an arithmetic number, because the mean of its divisors is an integer number (15331626).

Almost surely, 2^51105415 is an apocalyptic number.

51105415 is a deficient number, since it is larger than the sum of its proper divisors (10221089).

51105415 is a wasteful number, since it uses less digits than its factorization.

51105415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10221088.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 51105415 is about 7148.8051449176. The cubic root of 51105415 is about 371.0983070517.

The spelling of 51105415 in words is "fifty-one million, one hundred five thousand, four hundred fifteen".