51152449 has 4 divisors (see below), whose sum is σ = 52802560. Its totient is φ = 49502340.

The previous prime is 51152443. The next prime is 51152477. The reversal of 51152449 is 94425115.

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 51152449 - 2⁹ = 51151937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1650079 = 51152449 / (5 + 1 + 1 + 5 + 2 + 4 + 4 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51152449.

It is not an unprimeable number, because it can be changed into a prime (51152443) 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, 825009 + ... + 825070.

It is an arithmetic number, because the mean of its divisors is an integer number (13200640).

Almost surely, 2^51152449 is an apocalyptic number.

It is an amenable number.

51152449 is a deficient number, since it is larger than the sum of its proper divisors (1650111).

51152449 is a wasteful number, since it uses less digits than its factorization.

51152449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650110.

The product of its digits is 7200, while the sum is 31.

The square root of 51152449 is about 7152.0940290239. The cubic root of 51152449 is about 371.2121168175.

The spelling of 51152449 in words is "fifty-one million, one hundred fifty-two thousand, four hundred forty-nine".