51445369 has 4 divisors (see below), whose sum is σ = 54153040. Its totient is φ = 48737700.

The previous prime is 51445357. The next prime is 51445421. The reversal of 51445369 is 96354415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51445369 - 2⁹ = 51444857 is a prime.

It is a super-2 number, since 2×51445369² = 5293251983092322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51445769) 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, 1353807 + ... + 1353844.

It is an arithmetic number, because the mean of its divisors is an integer number (13538260).

Almost surely, 2^51445369 is an apocalyptic number.

It is an amenable number.

51445369 is a deficient number, since it is larger than the sum of its proper divisors (2707671).

51445369 is a wasteful number, since it uses less digits than its factorization.

51445369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707670.

The product of its digits is 64800, while the sum is 37.

The square root of 51445369 is about 7172.5427151046. The cubic root of 51445369 is about 371.9193397593.

The spelling of 51445369 in words is "fifty-one million, four hundred forty-five thousand, three hundred sixty-nine".