51111542 has 8 divisors (see below), whose sum is σ = 76729896. Its totient is φ = 25534912.

The previous prime is 51111493. The next prime is 51111559. The reversal of 51111542 is 24511115.

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

It is a super-2 number, since 2×51111542² = 5224779451235528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7163 + ... + 12390.

It is an arithmetic number, because the mean of its divisors is an integer number (9591237).

Almost surely, 2^51111542 is an apocalyptic number.

51111542 is a deficient number, since it is larger than the sum of its proper divisors (25618354).

51111542 is a wasteful number, since it uses less digits than its factorization.

51111542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20862.

The product of its digits is 200, while the sum is 20.

The square root of 51111542 is about 7149.2336652259. The cubic root of 51111542 is about 371.1131367162.

Adding to 51111542 its reverse (24511115), we get a palindrome (75622657).

The spelling of 51111542 in words is "fifty-one million, one hundred eleven thousand, five hundred forty-two".