51363911 has 4 divisors (see below), whose sum is σ = 51633024. Its totient is φ = 51094800.

The previous prime is 51363889. The next prime is 51363913. The reversal of 51363911 is 11936315.

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 51363911 - 2¹⁸ = 51101767 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 (51363913) 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, 134270 + ... + 134651.

It is an arithmetic number, because the mean of its divisors is an integer number (12908256).

Almost surely, 2^51363911 is an apocalyptic number.

51363911 is a deficient number, since it is larger than the sum of its proper divisors (269113).

51363911 is a wasteful number, since it uses less digits than its factorization.

51363911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269112.

The product of its digits is 2430, while the sum is 29.

The square root of 51363911 is about 7166.8620050898. The cubic root of 51363911 is about 371.7229384747.

The spelling of 51363911 in words is "fifty-one million, three hundred sixty-three thousand, nine hundred eleven".