51135455 has 16 divisors (see below), whose sum is σ = 70371840. Its totient is φ = 34942752.

The previous prime is 51135449. The next prime is 51135481. The reversal of 51135455 is 55453115.

It is a cyclic number.

It is not a de Polignac number, because 51135455 - 2¹⁰ = 51134431 is a prime.

It is a super-2 number, since 2×51135455² = 5229669516114050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8366 + ... + 13124.

It is an arithmetic number, because the mean of its divisors is an integer number (4398240).

Almost surely, 2^51135455 is an apocalyptic number.

51135455 is a deficient number, since it is larger than the sum of its proper divisors (19236385).

51135455 is a wasteful number, since it uses less digits than its factorization.

51135455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078.

The product of its digits is 7500, while the sum is 29.

The square root of 51135455 is about 7150.9058866692. The cubic root of 51135455 is about 371.1710039118.

The spelling of 51135455 in words is "fifty-one million, one hundred thirty-five thousand, four hundred fifty-five".