61531410 has 32 divisors (see below), whose sum is σ = 150465600. Its totient is φ = 16098368.

The previous prime is 61531403. The next prime is 61531423. The reversal of 61531410 is 1413516.

61531410 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 2×61531410² = 7572228833176200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 17760 + ... + 20939.

It is an arithmetic number, because the mean of its divisors is an integer number (4702050).

Almost surely, 2^61531410 is an apocalyptic number.

61531410 is an abundant number, since it is smaller than the sum of its proper divisors (88934190).

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

61531410 is a wasteful number, since it uses less digits than its factorization.

61531410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38762.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 61531410 is about 7844.1959434986. The cubic root of 61531410 is about 394.7895262827.

Adding to 61531410 its reverse (1413516), we get a palindrome (62944926).

The spelling of 61531410 in words is "sixty-one million, five hundred thirty-one thousand, four hundred ten".