61334381 has 4 divisors (see below), whose sum is σ = 62174652. Its totient is φ = 60494112.

The previous prime is 61334363. The next prime is 61334393. The reversal of 61334381 is 18343316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16564900 + 44769481 = 4070^2 + 6691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61334381 is a prime.

It is a super-2 number, since 2×61334381² = 7523812585306322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61334281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420026 + ... + 420171.

It is an arithmetic number, because the mean of its divisors is an integer number (15543663).

Almost surely, 2^61334381 is an apocalyptic number.

It is an amenable number.

61334381 is a deficient number, since it is larger than the sum of its proper divisors (840271).

61334381 is an equidigital number, since it uses as much as digits as its factorization.

61334381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840270.

The product of its digits is 5184, while the sum is 29.

The square root of 61334381 is about 7831.6269701768. The cubic root of 61334381 is about 394.3676920879.

Adding to 61334381 its reverse (18343316), we get a palindrome (79677697).

The spelling of 61334381 in words is "sixty-one million, three hundred thirty-four thousand, three hundred eighty-one".