51155455 has 12 divisors (see below), whose sum is σ = 66472920. Its totient is φ = 37775712.

The previous prime is 51155453. The next prime is 51155471. The reversal of 51155455 is 55455115.

It is not a de Polignac number, because 51155455 - 2¹ = 51155453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29425 + ... + 31114.

It is an arithmetic number, because the mean of its divisors is an integer number (5539410).

Almost surely, 2^51155455 is an apocalyptic number.

51155455 is a deficient number, since it is larger than the sum of its proper divisors (15317465).

51155455 is a wasteful number, since it uses less digits than its factorization.

51155455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60570 (or 60557 counting only the distinct ones).

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

The square root of 51155455 is about 7152.3041741805. The cubic root of 51155455 is about 371.2193881655.

The spelling of 51155455 in words is "fifty-one million, one hundred fifty-five thousand, four hundred fifty-five".