51045442 has 8 divisors (see below), whose sum is σ = 87506496. Its totient is φ = 21876612.

The previous prime is 51045383. The next prime is 51045497. The reversal of 51045442 is 24454015.

It is a happy number.

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, 1823038 + ... + 1823065.

It is an arithmetic number, because the mean of its divisors is an integer number (10938312).

Almost surely, 2^51045442 is an apocalyptic number.

51045442 is a deficient number, since it is larger than the sum of its proper divisors (36461054).

51045442 is a wasteful number, since it uses less digits than its factorization.

51045442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646112.

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

The square root of 51045442 is about 7144.6092965256. The cubic root of 51045442 is about 370.9530870176.

Adding to 51045442 its reverse (24454015), we get a palindrome (75499457).

The spelling of 51045442 in words is "fifty-one million, forty-five thousand, four hundred forty-two".