51121355 has 8 divisors (see below), whose sum is σ = 62351664. Its totient is φ = 40226400.

The previous prime is 51121339. The next prime is 51121361. The reversal of 51121355 is 55312115.

It is a happy number.

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

It is not a de Polignac number, because 51121355 - 2⁴ = 51121339 is a prime.

It is a super-2 number, since 2×51121355² = 5226785874072050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51121355.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83501 + ... + 84110.

It is an arithmetic number, because the mean of its divisors is an integer number (7793958).

Almost surely, 2^51121355 is an apocalyptic number.

51121355 is a deficient number, since it is larger than the sum of its proper divisors (11230309).

51121355 is a wasteful number, since it uses less digits than its factorization.

51121355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167677.

The product of its digits is 750, while the sum is 23.

The square root of 51121355 is about 7149.9199296216. The cubic root of 51121355 is about 371.1368854301.

The spelling of 51121355 in words is "fifty-one million, one hundred twenty-one thousand, three hundred fifty-five".