61315340 has 24 divisors (see below), whose sum is σ = 128928912. Its totient is φ = 24494400.

The previous prime is 61315321. The next prime is 61315343. The reversal of 61315340 is 4351316.

It is a happy number.

61315340 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 (61315343) 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, 19562 + ... + 22478.

It is an arithmetic number, because the mean of its divisors is an integer number (5372038).

Almost surely, 2^61315340 is an apocalyptic number.

It is an amenable number.

61315340 is an abundant number, since it is smaller than the sum of its proper divisors (67613572).

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

61315340 is a wasteful number, since it uses less digits than its factorization.

61315340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977 (or 3975 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 61315340 is about 7830.4112280263. The cubic root of 61315340 is about 394.3268779350.

Adding to 61315340 its reverse (4351316), we get a palindrome (65666656).

The spelling of 61315340 in words is "sixty-one million, three hundred fifteen thousand, three hundred forty".