51913222 has 8 divisors (see below), whose sum is σ = 78305400. Its totient is φ = 25811424.

The previous prime is 51913207. The next prime is 51913249. The reversal of 51913222 is 22231915.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72147 + ... + 72862.

It is an arithmetic number, because the mean of its divisors is an integer number (9788175).

Almost surely, 2^51913222 is an apocalyptic number.

51913222 is a deficient number, since it is larger than the sum of its proper divisors (26392178).

51913222 is a wasteful number, since it uses less digits than its factorization.

51913222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145190.

The product of its digits is 1080, while the sum is 25.

The square root of 51913222 is about 7205.0830668355. The cubic root of 51913222 is about 373.0433719664.

The spelling of 51913222 in words is "fifty-one million, nine hundred thirteen thousand, two hundred twenty-two".