51613386 has 64 divisors (see below), whose sum is σ = 120268800. Its totient is φ = 14601600.

The previous prime is 51613351. The next prime is 51613399. The reversal of 51613386 is 68331615.

51613386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51613386² = 5327883228769992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98806 + ... + 99326.

It is an arithmetic number, because the mean of its divisors is an integer number (1879200).

Almost surely, 2^51613386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51613386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60134400).

51613386 is an abundant number, since it is smaller than the sum of its proper divisors (68655414).

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

51613386 is a wasteful number, since it uses less digits than its factorization.

51613386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635.

The product of its digits is 12960, while the sum is 33.

The square root of 51613386 is about 7184.2456806543. The cubic root of 51613386 is about 372.3237873515.

The spelling of 51613386 in words is "fifty-one million, six hundred thirteen thousand, three hundred eighty-six".