51669449 has 8 divisors (see below), whose sum is σ = 55796160. Its totient is φ = 47564496.

The previous prime is 51669433. The next prime is 51669461. The reversal of 51669449 is 94496615.

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

It is a cyclic number.

It is not a de Polignac number, because 51669449 - 2⁴ = 51669433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51669049) 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, 317 + ... + 10170.

It is an arithmetic number, because the mean of its divisors is an integer number (6974520).

Almost surely, 2^51669449 is an apocalyptic number.

It is an amenable number.

51669449 is a deficient number, since it is larger than the sum of its proper divisors (4126711).

51669449 is a wasteful number, since it uses less digits than its factorization.

51669449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10879.

The product of its digits is 233280, while the sum is 44.

The square root of 51669449 is about 7188.1464231052. The cubic root of 51669449 is about 372.4585459026.

The spelling of 51669449 in words is "fifty-one million, six hundred sixty-nine thousand, four hundred forty-nine".