51225155 has 8 divisors (see below), whose sum is σ = 61560000. Its totient is φ = 40920256.

The previous prime is 51225149. The next prime is 51225179. The reversal of 51225155 is 55152215.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51225155 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, 3530 + ... + 10719.

It is an arithmetic number, because the mean of its divisors is an integer number (7695000).

Almost surely, 2^51225155 is an apocalyptic number.

51225155 is a deficient number, since it is larger than the sum of its proper divisors (10334845).

51225155 is a wasteful number, since it uses less digits than its factorization.

51225155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14973.

The product of its digits is 2500, while the sum is 26.

The square root of 51225155 is about 7157.1750712135. The cubic root of 51225155 is about 371.3879087988.

The spelling of 51225155 in words is "fifty-one million, two hundred twenty-five thousand, one hundred fifty-five".