51441621 has 48 divisors (see below), whose sum is σ = 90123840. Its totient is φ = 25777920.

The previous prime is 51441619. The next prime is 51441661. The reversal of 51441621 is 12614415.

It is a happy number.

It is not a de Polignac number, because 51441621 - 2¹ = 51441619 is a prime.

It is a super-2 number, since 2×51441621² = 5292480742215282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51441591 and 51441600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51441601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46345 + ... + 47441.

It is an arithmetic number, because the mean of its divisors is an integer number (1877580).

Almost surely, 2^51441621 is an apocalyptic number.

It is an amenable number.

51441621 is a deficient number, since it is larger than the sum of its proper divisors (38682219).

51441621 is a wasteful number, since it uses less digits than its factorization.

51441621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154 (or 1147 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 51441621 is about 7172.2814361959. The cubic root of 51441621 is about 371.9103076049.

The spelling of 51441621 in words is "fifty-one million, four hundred forty-one thousand, six hundred twenty-one".