51440633 has 4 divisors (see below), whose sum is σ = 51459408. Its totient is φ = 51421860.

The previous prime is 51440617. The next prime is 51440647. The reversal of 51440633 is 33604415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51440633 - 2⁴ = 51440617 is a prime.

It is a super-2 number, since 2×51440633² = 5292277446881378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51440663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4391 + ... + 11052.

It is an arithmetic number, because the mean of its divisors is an integer number (12864852).

Almost surely, 2^51440633 is an apocalyptic number.

It is an amenable number.

51440633 is a deficient number, since it is larger than the sum of its proper divisors (18775).

51440633 is a wasteful number, since it uses less digits than its factorization.

51440633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18774.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 51440633 is about 7172.2125595941. The cubic root of 51440633 is about 371.9079265904.

The spelling of 51440633 in words is "fifty-one million, four hundred forty thousand, six hundred thirty-three".