51298121 has 4 divisors (see below), whose sum is σ = 58626432. Its totient is φ = 43969812.

The previous prime is 51298111. The next prime is 51298151. The reversal of 51298121 is 12189215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51298121 - 2¹⁰ = 51297097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51298111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3664145 + ... + 3664158.

It is an arithmetic number, because the mean of its divisors is an integer number (14656608).

Almost surely, 2^51298121 is an apocalyptic number.

It is an amenable number.

51298121 is a deficient number, since it is larger than the sum of its proper divisors (7328311).

51298121 is an equidigital number, since it uses as much as digits as its factorization.

51298121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7328310.

The product of its digits is 1440, while the sum is 29.

The square root of 51298121 is about 7162.2706595046. The cubic root of 51298121 is about 371.5641622672.

The spelling of 51298121 in words is "fifty-one million, two hundred ninety-eight thousand, one hundred twenty-one".