51499849 has 4 divisors (see below), whose sum is σ = 51981264. Its totient is φ = 51018436.

The previous prime is 51499837. The next prime is 51499859. The reversal of 51499849 is 94899415.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51499849 - 2¹¹ = 51497801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51499859) 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, 240547 + ... + 240760.

It is an arithmetic number, because the mean of its divisors is an integer number (12995316).

Almost surely, 2^51499849 is an apocalyptic number.

It is an amenable number.

51499849 is a deficient number, since it is larger than the sum of its proper divisors (481415).

51499849 is a wasteful number, since it uses less digits than its factorization.

51499849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481414.

The product of its digits is 466560, while the sum is 49.

The square root of 51499849 is about 7176.3395265274. The cubic root of 51499849 is about 372.0505794139.

The spelling of 51499849 in words is "fifty-one million, four hundred ninety-nine thousand, eight hundred forty-nine".