51495149 has 16 divisors (see below), whose sum is σ = 55553280. Its totient is φ = 47589120.

The previous prime is 51495121. The next prime is 51495151. The reversal of 51495149 is 94159415.

It is a cyclic number.

It is not a de Polignac number, because 51495149 - 2²⁴ = 34717933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51495049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189884 + ... + 190154.

It is an arithmetic number, because the mean of its divisors is an integer number (3472080).

Almost surely, 2^51495149 is an apocalyptic number.

It is an amenable number.

51495149 is a deficient number, since it is larger than the sum of its proper divisors (4058131).

51495149 is a wasteful number, since it uses less digits than its factorization.

51495149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500.

The product of its digits is 32400, while the sum is 38.

The square root of 51495149 is about 7176.0120540590. The cubic root of 51495149 is about 372.0392609929.

The spelling of 51495149 in words is "fifty-one million, four hundred ninety-five thousand, one hundred forty-nine".