51338121 has 8 divisors (see below), whose sum is σ = 68943840. Its totient is φ = 33978912.

The previous prime is 51338117. The next prime is 51338141. The reversal of 51338121 is 12183315.

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

It is not a de Polignac number, because 51338121 - 2² = 51338117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51338091 and 51338100.

It is not an unprimeable number, because it can be changed into a prime (51338101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61140 + ... + 61973.

It is an arithmetic number, because the mean of its divisors is an integer number (8617980).

Almost surely, 2^51338121 is an apocalyptic number.

It is an amenable number.

51338121 is a deficient number, since it is larger than the sum of its proper divisors (17605719).

51338121 is a wasteful number, since it uses less digits than its factorization.

51338121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123255.

The product of its digits is 720, while the sum is 24.

The square root of 51338121 is about 7165.0625258961. The cubic root of 51338121 is about 371.6607135951.

The spelling of 51338121 in words is "fifty-one million, three hundred thirty-eight thousand, one hundred twenty-one".