51121205 has 8 divisors (see below), whose sum is σ = 61713792. Its totient is φ = 40651408.

The previous prime is 51121163. The next prime is 51121237. The reversal of 51121205 is 50212115.

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

It is a cyclic number.

It is not a de Polignac number, because 51121205 - 2⁶ = 51121141 is a prime.

It is a super-2 number, since 2×51121205² = 5226755201304050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29777 + ... + 31446.

It is an arithmetic number, because the mean of its divisors is an integer number (7714224).

Almost surely, 2^51121205 is an apocalyptic number.

It is an amenable number.

51121205 is a deficient number, since it is larger than the sum of its proper divisors (10592587).

51121205 is a wasteful number, since it uses less digits than its factorization.

51121205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61395.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 51121205 is about 7149.9094399859. The cubic root of 51121205 is about 371.1365224338.

The spelling of 51121205 in words is "fifty-one million, one hundred twenty-one thousand, two hundred five".