51136449 has 24 divisors (see below), whose sum is σ = 85417920. Its totient is φ = 26972064.

The previous prime is 51136447. The next prime is 51136457. The reversal of 51136449 is 94463115.

It is not a de Polignac number, because 51136449 - 2¹ = 51136447 is a prime.

It is a super-2 number, since 2×51136449² = 5229872832659202, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51136447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11469 + ... + 15290.

It is an arithmetic number, because the mean of its divisors is an integer number (3559080).

Almost surely, 2^51136449 is an apocalyptic number.

It is an amenable number.

51136449 is a deficient number, since it is larger than the sum of its proper divisors (34281471).

51136449 is a wasteful number, since it uses less digits than its factorization.

51136449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26789 (or 26782 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 51136449 is about 7150.9753880153. The cubic root of 51136449 is about 371.1734089071.

The spelling of 51136449 in words is "fifty-one million, one hundred thirty-six thousand, four hundred forty-nine".