51023663 has 4 divisors (see below), whose sum is σ = 51491880. Its totient is φ = 50555448.

The previous prime is 51023659. The next prime is 51023701. The reversal of 51023663 is 36632015.

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 51023663 - 2² = 51023659 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 (51023363) 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, 233945 + ... + 234162.

It is an arithmetic number, because the mean of its divisors is an integer number (12872970).

Almost surely, 2^51023663 is an apocalyptic number.

51023663 is a deficient number, since it is larger than the sum of its proper divisors (468217).

51023663 is a wasteful number, since it uses less digits than its factorization.

51023663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468216.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 51023663 is about 7143.0849777950. The cubic root of 51023663 is about 370.9003226817.

Adding to 51023663 its reverse (36632015), we get a palindrome (87655678).

The spelling of 51023663 in words is "fifty-one million, twenty-three thousand, six hundred sixty-three".