51222542 has 12 divisors (see below), whose sum is σ = 89378280. Its totient is φ = 21952476.

The previous prime is 51222533. The next prime is 51222559. The reversal of 51222542 is 24522215.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 261242 + ... + 261437.

It is an arithmetic number, because the mean of its divisors is an integer number (7448190).

Almost surely, 2^51222542 is an apocalyptic number.

51222542 is a deficient number, since it is larger than the sum of its proper divisors (38155738).

51222542 is a wasteful number, since it uses less digits than its factorization.

51222542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522695 (or 522688 counting only the distinct ones).

The product of its digits is 1600, while the sum is 23.

The square root of 51222542 is about 7156.9925247970. The cubic root of 51222542 is about 371.3815938473.

Adding to 51222542 its reverse (24522215), we get a palindrome (75744757).

The spelling of 51222542 in words is "fifty-one million, two hundred twenty-two thousand, five hundred forty-two".