61345731 has 8 divisors (see below), whose sum is σ = 81973584. Its totient is φ = 40807520.

The previous prime is 61345727. The next prime is 61345733. The reversal of 61345731 is 13754316.

61345731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61345731 - 2² = 61345727 is a prime.

It is a super-2 number, since 2×61345731² = 7526597423848722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61345733) 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, 20796 + ... + 23561.

It is an arithmetic number, because the mean of its divisors is an integer number (10246698).

Almost surely, 2^61345731 is an apocalyptic number.

61345731 is a deficient number, since it is larger than the sum of its proper divisors (20627853).

61345731 is a wasteful number, since it uses less digits than its factorization.

61345731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44821.

The product of its digits is 7560, while the sum is 30.

The square root of 61345731 is about 7832.3515625896. The cubic root of 61345731 is about 394.3920166574.

The spelling of 61345731 in words is "sixty-one million, three hundred forty-five thousand, seven hundred thirty-one".