51411621 has 16 divisors (see below), whose sum is σ = 73013184. Its totient is φ = 32066304.

The previous prime is 51411599. The next prime is 51411623. The reversal of 51411621 is 12611415.

It is not a de Polignac number, because 51411621 - 2⁵ = 51411589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51411623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5910 + ... + 11736.

It is an arithmetic number, because the mean of its divisors is an integer number (4563324).

Almost surely, 2^51411621 is an apocalyptic number.

51411621 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

51411621 is a deficient number, since it is larger than the sum of its proper divisors (21601563).

51411621 is a wasteful number, since it uses less digits than its factorization.

51411621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6020.

The product of its digits is 240, while the sum is 21.

The square root of 51411621 is about 7170.1897464433. The cubic root of 51411621 is about 371.8379959979.

The spelling of 51411621 in words is "fifty-one million, four hundred eleven thousand, six hundred twenty-one".