51113642 has 8 divisors (see below), whose sum is σ = 76701600. Its totient is φ = 25546444.

The previous prime is 51113639. The next prime is 51113663. The reversal of 51113642 is 24631115.

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

It is a super-2 number, since 2×51113642² = 5225208797008328, which contains 22 as substring.

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, 4859 + ... + 11217.

It is an arithmetic number, because the mean of its divisors is an integer number (9587700).

Almost surely, 2^51113642 is an apocalyptic number.

51113642 is a deficient number, since it is larger than the sum of its proper divisors (25587958).

51113642 is a wasteful number, since it uses less digits than its factorization.

51113642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10380.

The product of its digits is 720, while the sum is 23.

The square root of 51113642 is about 7149.3805326056. The cubic root of 51113642 is about 371.1182192401.

Adding to 51113642 its reverse (24631115), we get a palindrome (75744757).

The spelling of 51113642 in words is "fifty-one million, one hundred thirteen thousand, six hundred forty-two".