51111342 has 12 divisors (see below), whose sum is σ = 110741280. Its totient is φ = 17037108.

The previous prime is 51111331. The next prime is 51111373. The reversal of 51111342 is 24311115.

51111342 is a `hidden beast` number, since 511 + 113 + 42 = 666.

It is a super-2 number, since 2×51111342² = 5224738562081928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2839519 = 51111342 / (5 + 1 + 1 + 1 + 1 + 3 + 4 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1419742 + ... + 1419777.

It is an arithmetic number, because the mean of its divisors is an integer number (9228440).

Almost surely, 2^51111342 is an apocalyptic number.

51111342 is an abundant number, since it is smaller than the sum of its proper divisors (59629938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51111342 is a wasteful number, since it uses less digits than its factorization.

51111342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839527 (or 2839524 counting only the distinct ones).

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

The square root of 51111342 is about 7149.2196776991. The cubic root of 51111342 is about 371.1126526590.

Adding to 51111342 its reverse (24311115), we get a palindrome (75422457).

The spelling of 51111342 in words is "fifty-one million, one hundred eleven thousand, three hundred forty-two".