51949518 has 32 divisors (see below), whose sum is σ = 110522880. Its totient is φ = 16222080.

The previous prime is 51949511. The next prime is 51949519. The reversal of 51949518 is 81594915.

It is a self number, because there is not a number n which added to its sum of digits gives 51949518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51949511) 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, 23313 + ... + 25443.

It is an arithmetic number, because the mean of its divisors is an integer number (3453840).

Almost surely, 2^51949518 is an apocalyptic number.

51949518 is an abundant number, since it is smaller than the sum of its proper divisors (58573362).

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

51949518 is a wasteful number, since it uses less digits than its factorization.

51949518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392.

The product of its digits is 64800, while the sum is 42.

The square root of 51949518 is about 7207.6014040733. The cubic root of 51949518 is about 373.1302915562.

The spelling of 51949518 in words is "fifty-one million, nine hundred forty-nine thousand, five hundred eighteen".