51397622 has 12 divisors (see below), whose sum is σ = 81223980. Its totient is φ = 24325308.

The previous prime is 51397609. The next prime is 51397631. The reversal of 51397622 is 22679315.

It is a super-3 number, since 3×51397622³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43613 + ... + 44775.

It is an arithmetic number, because the mean of its divisors is an integer number (6768665).

Almost surely, 2^51397622 is an apocalyptic number.

51397622 is a deficient number, since it is larger than the sum of its proper divisors (29826358).

51397622 is an equidigital number, since it uses as much as digits as its factorization.

51397622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347 (or 1184 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 51397622 is about 7169.2134854529. The cubic root of 51397622 is about 371.8042433654.

The spelling of 51397622 in words is "fifty-one million, three hundred ninety-seven thousand, six hundred twenty-two".