51116242 has 4 divisors (see below), whose sum is σ = 76674366. Its totient is φ = 25558120.

The previous prime is 51116173. The next prime is 51116249. The reversal of 51116242 is 24261115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24261115 = 5 ⋅4852223.

It can be written as a sum of positive squares in only one way, i.e., 42653961 + 8462281 = 6531^2 + 2909^2 .

It is a super-3 number, since 3×51116242³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (51116249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12779059 + ... + 12779062.

Almost surely, 2^51116242 is an apocalyptic number.

51116242 is a deficient number, since it is larger than the sum of its proper divisors (25558124).

51116242 is a wasteful number, since it uses less digits than its factorization.

51116242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25558123.

The product of its digits is 480, while the sum is 22.

The square root of 51116242 is about 7149.5623642290. The cubic root of 51116242 is about 371.1245116960.

Adding to 51116242 its reverse (24261115), we get a palindrome (75377357).

The spelling of 51116242 in words is "fifty-one million, one hundred sixteen thousand, two hundred forty-two".