51423111 has 12 divisors (see below), whose sum is σ = 74549592. Its totient is φ = 34156656.

The previous prime is 51423109. The next prime is 51423157. The reversal of 51423111 is 11132415.

It is not a de Polignac number, because 51423111 - 2¹ = 51423109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51423611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7821 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (6212466).

Almost surely, 2^51423111 is an apocalyptic number.

51423111 is a deficient number, since it is larger than the sum of its proper divisors (23126481).

51423111 is a wasteful number, since it uses less digits than its factorization.

51423111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20910 (or 20907 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 51423111 is about 7170.9909357076. The cubic root of 51423111 is about 371.8656946663.

Adding to 51423111 its reverse (11132415), we get a palindrome (62555526).

The spelling of 51423111 in words is "fifty-one million, four hundred twenty-three thousand, one hundred eleven".