51113155 has 8 divisors (see below), whose sum is σ = 61654752. Its totient is φ = 40677888.

The previous prime is 51113149. The next prime is 51113159. The reversal of 51113155 is 55131115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51113155 - 2⁹ = 51112643 is a prime.

It is a super-2 number, since 2×51113155² = 5225109228108050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51113159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25519 + ... + 27448.

It is an arithmetic number, because the mean of its divisors is an integer number (7706844).

Almost surely, 2^51113155 is an apocalyptic number.

51113155 is a deficient number, since it is larger than the sum of its proper divisors (10541597).

51113155 is a wasteful number, since it uses less digits than its factorization.

51113155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53165.

The product of its digits is 375, while the sum is 22.

The square root of 51113155 is about 7149.3464736296. The cubic root of 51113155 is about 371.1170405910.

The spelling of 51113155 in words is "fifty-one million, one hundred thirteen thousand, one hundred fifty-five".