51404442 has 16 divisors (see below), whose sum is σ = 103965120. Its totient is φ = 16942112.

The previous prime is 51404429. The next prime is 51404459. The reversal of 51404442 is 24440415.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47598 + ... + 48665.

It is an arithmetic number, because the mean of its divisors is an integer number (6497820).

Almost surely, 2^51404442 is an apocalyptic number.

51404442 is an abundant number, since it is smaller than the sum of its proper divisors (52560678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51404442 is a wasteful number, since it uses less digits than its factorization.

51404442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96357.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 51404442 is about 7169.6891145990. The cubic root of 51404442 is about 371.8206876592.

Adding to 51404442 its reverse (24440415), we get a palindrome (75844857).

The spelling of 51404442 in words is "fifty-one million, four hundred four thousand, four hundred forty-two".