51244401 has 8 divisors (see below), whose sum is σ = 73581760. Its totient is φ = 31534992.

The previous prime is 51244399. The next prime is 51244447. The reversal of 51244401 is 10444215.

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 51244401 - 2¹ = 51244399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51244801) 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, 656941 + ... + 657018.

It is an arithmetic number, because the mean of its divisors is an integer number (9197720).

Almost surely, 2^51244401 is an apocalyptic number.

It is an amenable number.

51244401 is a deficient number, since it is larger than the sum of its proper divisors (22337359).

51244401 is a wasteful number, since it uses less digits than its factorization.

51244401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313975.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 51244401 is about 7158.5194698345. The cubic root of 51244401 is about 371.4344148348.

Adding to 51244401 its reverse (10444215), we get a palindrome (61688616).

The spelling of 51244401 in words is "fifty-one million, two hundred forty-four thousand, four hundred one".