51223863 has 8 divisors (see below), whose sum is σ = 68790400. Its totient is φ = 33903288.

The previous prime is 51223853. The next prime is 51223897. The reversal of 51223863 is 36832215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51223863 - 2¹⁴ = 51207479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51223863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223813) 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, 61003 + ... + 61836.

It is an arithmetic number, because the mean of its divisors is an integer number (8598800).

Almost surely, 2^51223863 is an apocalyptic number.

51223863 is a deficient number, since it is larger than the sum of its proper divisors (17566537).

51223863 is a wasteful number, since it uses less digits than its factorization.

51223863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122981.

The product of its digits is 8640, while the sum is 30.

The square root of 51223863 is about 7157.0848115696. The cubic root of 51223863 is about 371.3847863927.

Adding to 51223863 its product of digits (8640), we get a triangular number (51232503 = T₁₀₁₂₂).

The spelling of 51223863 in words is "fifty-one million, two hundred twenty-three thousand, eight hundred sixty-three".