61582081 has 4 divisors (see below), whose sum is σ = 67180464. Its totient is φ = 55983700.

The previous prime is 61582067. The next prime is 61582091. The reversal of 61582081 is 18028516.

61582081 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 61582081 - 2¹⁹ = 61057793 is a prime.

It is a super-2 number, since 2×61582081² = 7584705400581122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61582061) 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, 2799175 + ... + 2799196.

It is an arithmetic number, because the mean of its divisors is an integer number (16795116).

Almost surely, 2^61582081 is an apocalyptic number.

It is an amenable number.

61582081 is a deficient number, since it is larger than the sum of its proper divisors (5598383).

61582081 is a wasteful number, since it uses less digits than its factorization.

61582081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5598382.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 61582081 is about 7847.4251191075. The cubic root of 61582081 is about 394.8978660256.

The spelling of 61582081 in words is "sixty-one million, five hundred eighty-two thousand, eighty-one".