51105405 has 16 divisors (see below), whose sum is σ = 88058880. Its totient is φ = 25159488.

The previous prime is 51105367. The next prime is 51105443. The reversal of 51105405 is 50450115.

It is an interprime number because it is at equal distance from previous prime (51105367) and next prime (51105443).

It is not a de Polignac number, because 51105405 - 2⁷ = 51105277 is a prime.

It is a super-2 number, since 2×51105405² = 5223524840428050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130845 + ... + 131234.

It is an arithmetic number, because the mean of its divisors is an integer number (5503680).

Almost surely, 2^51105405 is an apocalyptic number.

It is an amenable number.

51105405 is a deficient number, since it is larger than the sum of its proper divisors (36953475).

51105405 is a wasteful number, since it uses less digits than its factorization.

51105405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262100.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 51105405 is about 7148.8044455000. The cubic root of 51105405 is about 371.0982828469.

The spelling of 51105405 in words is "fifty-one million, one hundred five thousand, four hundred five".