51672249 has 16 divisors (see below), whose sum is σ = 77499840. Its totient is φ = 34446708.

The previous prime is 51672233. The next prime is 51672251. The reversal of 51672249 is 94227615.

51672249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51672249 - 2⁴ = 51672233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51672749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9627 + ... + 14000.

It is an arithmetic number, because the mean of its divisors is an integer number (4843740).

Almost surely, 2^51672249 is an apocalyptic number.

It is an amenable number.

51672249 is a deficient number, since it is larger than the sum of its proper divisors (25827591).

51672249 is an frugal number, since it uses more digits than its factorization.

51672249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23648 (or 23630 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 51672249 is about 7188.3411855587. The cubic root of 51672249 is about 372.4652737022.

The spelling of 51672249 in words is "fifty-one million, six hundred seventy-two thousand, two hundred forty-nine".