51917049 has 12 divisors (see below), whose sum is σ = 78252096. Its totient is φ = 33106392.

The previous prime is 51917023. The next prime is 51917057. The reversal of 51917049 is 94071915.

It is not a de Polignac number, because 51917049 - 2⁵ = 51917017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51917009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125197 + ... + 125610.

It is an arithmetic number, because the mean of its divisors is an integer number (6521008).

Almost surely, 2^51917049 is an apocalyptic number.

It is an amenable number.

51917049 is a deficient number, since it is larger than the sum of its proper divisors (26335047).

51917049 is a wasteful number, since it uses less digits than its factorization.

51917049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250836 (or 250833 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 51917049 is about 7205.3486383381. The cubic root of 51917049 is about 373.0525385579.

The spelling of 51917049 in words is "fifty-one million, nine hundred seventeen thousand, forty-nine".