51109149 has 24 divisors (see below), whose sum is σ = 84338112. Its totient is φ = 26956800.

The previous prime is 51109133. The next prime is 51109153. The reversal of 51109149 is 94190115.

It is not a de Polignac number, because 51109149 - 2⁴ = 51109133 is a prime.

It is a super-2 number, since 2×51109149² = 5224290223008402, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51109169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3652 + ... + 10749.

It is an arithmetic number, because the mean of its divisors is an integer number (3514088).

Almost surely, 2^51109149 is an apocalyptic number.

It is an amenable number.

51109149 is a deficient number, since it is larger than the sum of its proper divisors (33228963).

51109149 is a wasteful number, since it uses less digits than its factorization.

51109149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14437 (or 14424 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 51109149 is about 7149.0663026720. The cubic root of 51109149 is about 371.1073448894.

The spelling of 51109149 in words is "fifty-one million, one hundred nine thousand, one hundred forty-nine".