51155330 has 8 divisors (see below), whose sum is σ = 92079612. Its totient is φ = 20462128.

The previous prime is 51155311. The next prime is 51155347. The reversal of 51155330 is 3355115.

It can be written as a sum of positive squares in 2 ways, for example, as 50794129 + 361201 = 7127^2 + 601^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 51155296 and 51155305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2557757 + ... + 2557776.

Almost surely, 2^51155330 is an apocalyptic number.

51155330 is a deficient number, since it is larger than the sum of its proper divisors (40924282).

51155330 is a wasteful number, since it uses less digits than its factorization.

51155330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5115540.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 51155330 is about 7152.2954357325. The cubic root of 51155330 is about 371.2190858031.

The spelling of 51155330 in words is "fifty-one million, one hundred fifty-five thousand, three hundred thirty".