51544631 has 4 divisors (see below), whose sum is σ = 51580872. Its totient is φ = 51508392.

The previous prime is 51544627. The next prime is 51544639. The reversal of 51544631 is 13644515.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51544631 - 2² = 51544627 is a prime.

It is a super-2 number, since 2×51544631² = 5313697969852322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51544594 and 51544603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51544639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15896 + ... + 18861.

It is an arithmetic number, because the mean of its divisors is an integer number (12895218).

Almost surely, 2^51544631 is an apocalyptic number.

51544631 is a deficient number, since it is larger than the sum of its proper divisors (36241).

51544631 is a wasteful number, since it uses less digits than its factorization.

51544631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36240.

The product of its digits is 7200, while the sum is 29.

The square root of 51544631 is about 7179.4589629024. The cubic root of 51544631 is about 372.1583877695.

The spelling of 51544631 in words is "fifty-one million, five hundred forty-four thousand, six hundred thirty-one".