51322042 has 4 divisors (see below), whose sum is σ = 76983066. Its totient is φ = 25661020.

The previous prime is 51322009. The next prime is 51322049. The reversal of 51322042 is 24022315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24022315 = 5 ⋅4804463.

It can be written as a sum of positive squares in only one way, i.e., 40947201 + 10374841 = 6399^2 + 3221^2 .

It is not an unprimeable number, because it can be changed into a prime (51322049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12830509 + ... + 12830512.

Almost surely, 2^51322042 is an apocalyptic number.

51322042 is a deficient number, since it is larger than the sum of its proper divisors (25661024).

51322042 is a wasteful number, since it uses less digits than its factorization.

51322042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25661023.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 51322042 is about 7163.9403961786. The cubic root of 51322042 is about 371.6219084052.

Adding to 51322042 its reverse (24022315), we get a palindrome (75344357).

The spelling of 51322042 in words is "fifty-one million, three hundred twenty-two thousand, forty-two".