51242111 has 8 divisors (see below), whose sum is σ = 52550784. Its totient is φ = 49938840.

The previous prime is 51242089. The next prime is 51242117. The reversal of 51242111 is 11124215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51242111 - 2¹⁸ = 50979967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51242111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51242117) 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, 23510 + ... + 25596.

It is an arithmetic number, because the mean of its divisors is an integer number (6568848).

Almost surely, 2^51242111 is an apocalyptic number.

51242111 is a deficient number, since it is larger than the sum of its proper divisors (1308673).

51242111 is a wasteful number, since it uses less digits than its factorization.

51242111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701.

The product of its digits is 80, while the sum is 17.

The square root of 51242111 is about 7158.3595187724. The cubic root of 51242111 is about 371.4288818890.

Adding to 51242111 its reverse (11124215), we get a palindrome (62366326).

The spelling of 51242111 in words is "fifty-one million, two hundred forty-two thousand, one hundred eleven".