61833381 has 4 divisors (see below), whose sum is σ = 82444512. Its totient is φ = 41222252.

The previous prime is 61833367. The next prime is 61833383. The reversal of 61833381 is 18333816.

It is a happy number.

61833381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61833381 - 2¹¹ = 61831333 is a prime.

It is a super-2 number, since 2×61833381² = 7646734011782322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61833383) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10305561 + ... + 10305566.

It is an arithmetic number, because the mean of its divisors is an integer number (20611128).

Almost surely, 2^61833381 is an apocalyptic number.

It is an amenable number.

61833381 is a deficient number, since it is larger than the sum of its proper divisors (20611131).

61833381 is a wasteful number, since it uses less digits than its factorization.

61833381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20611130.

The product of its digits is 10368, while the sum is 33.

The square root of 61833381 is about 7863.4204389693. The cubic root of 61833381 is about 395.4342945322.

The spelling of 61833381 in words is "sixty-one million, eight hundred thirty-three thousand, three hundred eighty-one".