51434842 has 4 divisors (see below), whose sum is σ = 77152266. Its totient is φ = 25717420.

The previous prime is 51434827. The next prime is 51434849. The reversal of 51434842 is 24843415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24843415 = 5 ⋅4968683.

It can be written as a sum of positive squares in only one way, i.e., 46936201 + 4498641 = 6851^2 + 2121^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51434849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12858709 + ... + 12858712.

Almost surely, 2^51434842 is an apocalyptic number.

51434842 is a deficient number, since it is larger than the sum of its proper divisors (25717424).

51434842 is a wasteful number, since it uses less digits than its factorization.

51434842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25717423.

The product of its digits is 15360, while the sum is 31.

The square root of 51434842 is about 7171.8088373854. The cubic root of 51434842 is about 371.8939700513.

The spelling of 51434842 in words is "fifty-one million, four hundred thirty-four thousand, eight hundred forty-two".