51442734 has 64 divisors (see below), whose sum is σ = 121185792. Its totient is φ = 14256000.

The previous prime is 51442717. The next prime is 51442739. The reversal of 51442734 is 43724415.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51442739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284124 + ... + 284304.

It is an arithmetic number, because the mean of its divisors is an integer number (1893528).

Almost surely, 2^51442734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51442734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60592896).

51442734 is an abundant number, since it is smaller than the sum of its proper divisors (69743058).

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

51442734 is a wasteful number, since it uses less digits than its factorization.

51442734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361.

The product of its digits is 13440, while the sum is 30.

The square root of 51442734 is about 7172.3590261503. The cubic root of 51442734 is about 371.9129898246.

The spelling of 51442734 in words is "fifty-one million, four hundred forty-two thousand, seven hundred thirty-four".