51113839 has 16 divisors (see below), whose sum is σ = 60137280. Its totient is φ = 42531840.

The previous prime is 51113837. The next prime is 51113879. The reversal of 51113839 is 93831115.

It is a cyclic number.

It is not a de Polignac number, because 51113839 - 2¹ = 51113837 is a prime.

It is a super-2 number, since 2×51113839² = 5225249074635842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51113839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51113837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89547 + ... + 90115.

It is an arithmetic number, because the mean of its divisors is an integer number (3758580).

Almost surely, 2^51113839 is an apocalyptic number.

51113839 is a deficient number, since it is larger than the sum of its proper divisors (9023441).

51113839 is a wasteful number, since it uses less digits than its factorization.

51113839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930.

The product of its digits is 3240, while the sum is 31.

The square root of 51113839 is about 7149.3943100098. The cubic root of 51113839 is about 371.1186960221.

The spelling of 51113839 in words is "fifty-one million, one hundred thirteen thousand, eight hundred thirty-nine".