51455155 has 8 divisors (see below), whose sum is σ = 62017200. Its totient is φ = 40983456.

The previous prime is 51455143. The next prime is 51455167. The reversal of 51455155 is 55155415.

It is an interprime number because it is at equal distance from previous prime (51455143) and next prime (51455167).

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 51455155 - 2⁹ = 51454643 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21325 + ... + 23614.

It is an arithmetic number, because the mean of its divisors is an integer number (7752150).

Almost surely, 2^51455155 is an apocalyptic number.

51455155 is a deficient number, since it is larger than the sum of its proper divisors (10562045).

51455155 is a wasteful number, since it uses less digits than its factorization.

51455155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45173.

The product of its digits is 12500, while the sum is 31.

The square root of 51455155 is about 7173.2248675195. The cubic root of 51455155 is about 371.9429205789.

The spelling of 51455155 in words is "fifty-one million, four hundred fifty-five thousand, one hundred fifty-five".