51551119 has 4 divisors (see below), whose sum is σ = 53792496. Its totient is φ = 49309744.

The previous prime is 51551117. The next prime is 51551131. The reversal of 51551119 is 91115515.

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 51551119 - 2¹ = 51551117 is a prime.

It is a super-2 number, since 2×51551119² = 5315035740304322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51551111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120654 + ... + 1120699.

It is an arithmetic number, because the mean of its divisors is an integer number (13448124).

Almost surely, 2^51551119 is an apocalyptic number.

51551119 is a deficient number, since it is larger than the sum of its proper divisors (2241377).

51551119 is a wasteful number, since it uses less digits than its factorization.

51551119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241376.

The product of its digits is 1125, while the sum is 28.

The square root of 51551119 is about 7179.9107933177. The cubic root of 51551119 is about 372.1740018259.

The spelling of 51551119 in words is "fifty-one million, five hundred fifty-one thousand, one hundred nineteen".