51382121 has 8 divisors (see below), whose sum is σ = 58765824. Its totient is φ = 44009280.

The previous prime is 51382081. The next prime is 51382127. The reversal of 51382121 is 12128315.

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 51382121 - 2⁶ = 51382057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51382127) 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, 16721 + ... + 19553.

It is an arithmetic number, because the mean of its divisors is an integer number (7345728).

Almost surely, 2^51382121 is an apocalyptic number.

It is an amenable number.

51382121 is a deficient number, since it is larger than the sum of its proper divisors (7383703).

51382121 is a wasteful number, since it uses less digits than its factorization.

51382121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431.

The product of its digits is 480, while the sum is 23.

The square root of 51382121 is about 7168.1323229974. The cubic root of 51382121 is about 371.7668621479.

The spelling of 51382121 in words is "fifty-one million, three hundred eighty-two thousand, one hundred twenty-one".