51555151 has 8 divisors (see below), whose sum is σ = 55531520. Its totient is φ = 47705112.

The previous prime is 51555137. The next prime is 51555157. The reversal of 51555151 is 15155515.

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 51555151 - 2⁹ = 51554639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555157) 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, 30735 + ... + 32368.

It is an arithmetic number, because the mean of its divisors is an integer number (6941440).

Almost surely, 2^51555151 is an apocalyptic number.

51555151 is a deficient number, since it is larger than the sum of its proper divisors (3976369).

51555151 is a wasteful number, since it uses less digits than its factorization.

51555151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63165.

The product of its digits is 3125, while the sum is 28.

The square root of 51555151 is about 7180.1915712605. The cubic root of 51555151 is about 372.1837045991.

The spelling of 51555151 in words is "fifty-one million, five hundred fifty-five thousand, one hundred fifty-one".