51500049 has 4 divisors (see below), whose sum is σ = 68666736. Its totient is φ = 34333364.

The previous prime is 51500023. The next prime is 51500069. The reversal of 51500049 is 94000515.

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 51500049 - 2⁹ = 51499537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51500069) 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, 8583339 + ... + 8583344.

It is an arithmetic number, because the mean of its divisors is an integer number (17166684).

Almost surely, 2^51500049 is an apocalyptic number.

It is an amenable number.

51500049 is a deficient number, since it is larger than the sum of its proper divisors (17166687).

51500049 is a wasteful number, since it uses less digits than its factorization.

51500049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17166686.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 51500049 is about 7176.3534611946. The cubic root of 51500049 is about 372.0510610335.

The spelling of 51500049 in words is "fifty-one million, five hundred thousand, forty-nine".