51222694 has 8 divisors (see below), whose sum is σ = 78708168. Its totient is φ = 24986640.

The previous prime is 51222659. The next prime is 51222707. The reversal of 51222694 is 49622215.

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, 312252 + ... + 312415.

It is an arithmetic number, because the mean of its divisors is an integer number (9838521).

Almost surely, 2^51222694 is an apocalyptic number.

51222694 is a deficient number, since it is larger than the sum of its proper divisors (27485474).

51222694 is a wasteful number, since it uses less digits than its factorization.

51222694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624710.

The product of its digits is 8640, while the sum is 31.

The square root of 51222694 is about 7157.0031437746. The cubic root of 51222694 is about 371.3819611982.

The spelling of 51222694 in words is "fifty-one million, two hundred twenty-two thousand, six hundred ninety-four".