51492121 has 8 divisors (see below), whose sum is σ = 52778880. Its totient is φ = 50221392.

The previous prime is 51492079. The next prime is 51492127. The reversal of 51492121 is 12129415.

It is a happy number.

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 51492121 - 2¹¹ = 51490073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51492127) 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, 2631 + ... + 10483.

It is an arithmetic number, because the mean of its divisors is an integer number (6597360).

Almost surely, 2^51492121 is an apocalyptic number.

It is an amenable number.

51492121 is a deficient number, since it is larger than the sum of its proper divisors (1286759).

51492121 is an equidigital number, since it uses as much as digits as its factorization.

51492121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8015.

The product of its digits is 720, while the sum is 25.

The square root of 51492121 is about 7175.8010702639. The cubic root of 51492121 is about 372.0319686751.

The spelling of 51492121 in words is "fifty-one million, four hundred ninety-two thousand, one hundred twenty-one".