51223733 has 4 divisors (see below), whose sum is σ = 55880448. Its totient is φ = 46567020.

The previous prime is 51223729. The next prime is 51223763. The reversal of 51223733 is 33732215.

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 51223733 - 2² = 51223729 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223723) 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, 2328341 + ... + 2328362.

It is an arithmetic number, because the mean of its divisors is an integer number (13970112).

Almost surely, 2^51223733 is an apocalyptic number.

It is an amenable number.

51223733 is a deficient number, since it is larger than the sum of its proper divisors (4656715).

51223733 is a wasteful number, since it uses less digits than its factorization.

51223733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656714.

The product of its digits is 3780, while the sum is 26.

The square root of 51223733 is about 7157.0757296538. The cubic root of 51223733 is about 371.3844722158.

Adding to 51223733 its reverse (33732215), we get a palindrome (84955948).

The spelling of 51223733 in words is "fifty-one million, two hundred twenty-three thousand, seven hundred thirty-three".