51949218 has 8 divisors (see below), whose sum is σ = 103898448. Its totient is φ = 17316404.

The previous prime is 51949213. The next prime is 51949243. The reversal of 51949218 is 81294915.

It is a sphenic number, since it is the product of 3 distinct primes.

51949218 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (51949213) 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, 4329096 + ... + 4329107.

It is an arithmetic number, because the mean of its divisors is an integer number (12987306).

Almost surely, 2^51949218 is an apocalyptic number.

51949218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51949218 is a wasteful number, since it uses less digits than its factorization.

51949218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8658208.

The product of its digits is 25920, while the sum is 39.

The square root of 51949218 is about 7207.5805926816. The cubic root of 51949218 is about 373.1295732993.

The spelling of 51949218 in words is "fifty-one million, nine hundred forty-nine thousand, two hundred eighteen".