51436663 has 4 divisors (see below), whose sum is σ = 52087840. Its totient is φ = 50785488.

The previous prime is 51436661. The next prime is 51436681. The reversal of 51436663 is 36663415.

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 51436663 - 2¹ = 51436661 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 (51436661) 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, 325470 + ... + 325627.

It is an arithmetic number, because the mean of its divisors is an integer number (13021960).

Almost surely, 2^51436663 is an apocalyptic number.

51436663 is a deficient number, since it is larger than the sum of its proper divisors (651177).

51436663 is an equidigital number, since it uses as much as digits as its factorization.

51436663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651176.

The product of its digits is 38880, while the sum is 34.

The square root of 51436663 is about 7171.9357916814. The cubic root of 51436663 is about 371.8983588463.

The spelling of 51436663 in words is "fifty-one million, four hundred thirty-six thousand, six hundred sixty-three".