51149508 has 12 divisors (see below), whose sum is σ = 119348880. Its totient is φ = 17049832.

The previous prime is 51149507. The next prime is 51149513. The reversal of 51149508 is 80594115.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (51149507) 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, 2131218 + ... + 2131241.

It is an arithmetic number, because the mean of its divisors is an integer number (9945740).

Almost surely, 2^51149508 is an apocalyptic number.

It is an amenable number.

51149508 is an abundant number, since it is smaller than the sum of its proper divisors (68199372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51149508 is a wasteful number, since it uses less digits than its factorization.

51149508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262466 (or 4262464 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 51149508 is about 7151.8884219484. Note that the first 3 decimals coincide. The cubic root of 51149508 is about 371.2050024253.

The spelling of 51149508 in words is "fifty-one million, one hundred forty-nine thousand, five hundred eight".