51135555 has 64 divisors (see below), whose sum is σ = 93312000. Its totient is φ = 23772672.

The previous prime is 51135529. The next prime is 51135563. The reversal of 51135555 is 55553115.

It is not a de Polignac number, because 51135555 - 2²³ = 42746947 is a prime.

It is a super-2 number, since 2×51135555² = 5229689970316050, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 189961 + ... + 190229.

It is an arithmetic number, because the mean of its divisors is an integer number (1458000).

Almost surely, 2^51135555 is an apocalyptic number.

51135555 is a deficient number, since it is larger than the sum of its proper divisors (42176445).

51135555 is a wasteful number, since it uses less digits than its factorization.

51135555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348.

The product of its digits is 9375, while the sum is 30.

The square root of 51135555 is about 7150.9128787869. The cubic root of 51135555 is about 371.1712458645.

The spelling of 51135555 in words is "fifty-one million, one hundred thirty-five thousand, five hundred fifty-five".