51401121 has 4 divisors (see below), whose sum is σ = 68534832. Its totient is φ = 34267412.

The previous prime is 51401093. The next prime is 51401123. The reversal of 51401121 is 12110415.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-51401121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51401121.

It is not an unprimeable number, because it can be changed into a prime (51401123) 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, 8566851 + ... + 8566856.

It is an arithmetic number, because the mean of its divisors is an integer number (17133708).

Almost surely, 2^51401121 is an apocalyptic number.

It is an amenable number.

51401121 is a deficient number, since it is larger than the sum of its proper divisors (17133711).

51401121 is a wasteful number, since it uses less digits than its factorization.

51401121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17133710.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 51401121 is about 7169.4575108581. The cubic root of 51401121 is about 371.8126802897.

Adding to 51401121 its reverse (12110415), we get a palindrome (63511536).

The spelling of 51401121 in words is "fifty-one million, four hundred one thousand, one hundred twenty-one".