51225442 has 8 divisors (see below), whose sum is σ = 77764176. Its totient is φ = 25304052.

The previous prime is 51225431. The next prime is 51225467. The reversal of 51225442 is 24452215.

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

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, 154128 + ... + 154459.

It is an arithmetic number, because the mean of its divisors is an integer number (9720522).

Almost surely, 2^51225442 is an apocalyptic number.

51225442 is a deficient number, since it is larger than the sum of its proper divisors (26538734).

51225442 is a wasteful number, since it uses less digits than its factorization.

51225442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308672.

The product of its digits is 3200, while the sum is 25.

The square root of 51225442 is about 7157.1951209954. The cubic root of 51225442 is about 371.3886023912.

Adding to 51225442 its reverse (24452215), we get a palindrome (75677657).

The spelling of 51225442 in words is "fifty-one million, two hundred twenty-five thousand, four hundred forty-two".