61521410 has 16 divisors (see below), whose sum is σ = 112392576. Its totient is φ = 24241008.

The previous prime is 61521409. The next prime is 61521413. The reversal of 61521410 is 1412516.

61521410 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61521413) 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 7 ways as a sum of consecutive naturals, for example, 45242 + ... + 46581.

It is an arithmetic number, because the mean of its divisors is an integer number (7024536).

Almost surely, 2^61521410 is an apocalyptic number.

61521410 is a deficient number, since it is larger than the sum of its proper divisors (50871166).

61521410 is a wasteful number, since it uses less digits than its factorization.

61521410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91897.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 61521410 is about 7843.5585036385. The cubic root of 61521410 is about 394.7681382407.

Adding to 61521410 its reverse (1412516), we get a palindrome (62933926).

The spelling of 61521410 in words is "sixty-one million, five hundred twenty-one thousand, four hundred ten".