51401244 has 24 divisors (see below), whose sum is σ = 120234240. Its totient is φ = 17091184.

The previous prime is 51401243. The next prime is 51401267. The reversal of 51401244 is 44210415.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51401244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51401243) 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, 84 + ... + 10139.

It is an arithmetic number, because the mean of its divisors is an integer number (5009760).

Almost surely, 2^51401244 is an apocalyptic number.

It is an amenable number.

51401244 is an abundant number, since it is smaller than the sum of its proper divisors (68832996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51401244 is a wasteful number, since it uses less digits than its factorization.

51401244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10649 (or 10647 counting only the distinct ones).

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

The square root of 51401244 is about 7169.4660889079. The cubic root of 51401244 is about 371.8129768651.

Adding to 51401244 its reverse (44210415), we get a palindrome (95611659).

The spelling of 51401244 in words is "fifty-one million, four hundred one thousand, two hundred forty-four".