51110555 has 4 divisors (see below), whose sum is σ = 61332672. Its totient is φ = 40888440.

The previous prime is 51110519. The next prime is 51110581. The reversal of 51110555 is 55501115.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55501115 = 5 ⋅11100223.

It is not a de Polignac number, because 51110555 - 2⁸ = 51110299 is a prime.

It is a super-2 number, since 2×51110555² = 5224577664816050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51110555.

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, 5111051 + ... + 5111060.

It is an arithmetic number, because the mean of its divisors is an integer number (15333168).

Almost surely, 2^51110555 is an apocalyptic number.

51110555 is a deficient number, since it is larger than the sum of its proper divisors (10222117).

51110555 is a wasteful number, since it uses less digits than its factorization.

51110555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10222116.

The product of its (nonzero) digits is 625, while the sum is 23.

The square root of 51110555 is about 7149.1646365152. The cubic root of 51110555 is about 371.1107478818.

The spelling of 51110555 in words is "fifty-one million, one hundred ten thousand, five hundred fifty-five".