51444142 has 16 divisors (see below), whose sum is σ = 81838512. Its totient is φ = 24169600.

The previous prime is 51444137. The next prime is 51444143. The reversal of 51444142 is 24144415.

It is a super-2 number, since 2×51444142² = 5292999492232328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51444143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38892 + ... + 40192.

It is an arithmetic number, because the mean of its divisors is an integer number (5114907).

Almost surely, 2^51444142 is an apocalyptic number.

51444142 is a deficient number, since it is larger than the sum of its proper divisors (30394370).

51444142 is a wasteful number, since it uses less digits than its factorization.

51444142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483.

The product of its digits is 2560, while the sum is 25.

The square root of 51444142 is about 7172.4571800743. The cubic root of 51444142 is about 371.9163829097.

Adding to 51444142 its reverse (24144415), we get a palindrome (75588557).

The spelling of 51444142 in words is "fifty-one million, four hundred forty-four thousand, one hundred forty-two".