51669311 has 4 divisors (see below), whose sum is σ = 51684000. Its totient is φ = 51654624.

The previous prime is 51669301. The next prime is 51669313. The reversal of 51669311 is 11396615.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51669311 - 2¹⁴ = 51652927 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 (51669313) 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, 1415 + ... + 10263.

It is an arithmetic number, because the mean of its divisors is an integer number (12921000).

Almost surely, 2^51669311 is an apocalyptic number.

51669311 is a deficient number, since it is larger than the sum of its proper divisors (14689).

51669311 is an equidigital number, since it uses as much as digits as its factorization.

51669311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14688.

The product of its digits is 4860, while the sum is 32.

The square root of 51669311 is about 7188.1368239621. The cubic root of 51669311 is about 372.4582143120.

The spelling of 51669311 in words is "fifty-one million, six hundred sixty-nine thousand, three hundred eleven".