61724315 has 8 divisors (see below), whose sum is σ = 74344128. Its totient is φ = 49196160.

The previous prime is 61724309. The next prime is 61724321. The reversal of 61724315 is 51342716.

It is an interprime number because it is at equal distance from previous prime (61724309) and next prime (61724321).

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

It is not a de Polignac number, because 61724315 - 2¹⁴ = 61707931 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21422 + ... + 24131.

It is an arithmetic number, because the mean of its divisors is an integer number (9293016).

Almost surely, 2^61724315 is an apocalyptic number.

61724315 is a deficient number, since it is larger than the sum of its proper divisors (12619813).

61724315 is a wasteful number, since it uses less digits than its factorization.

61724315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45829.

The product of its digits is 5040, while the sum is 29.

The square root of 61724315 is about 7856.4823553547. The cubic root of 61724315 is about 395.2016595672.

The spelling of 61724315 in words is "sixty-one million, seven hundred twenty-four thousand, three hundred fifteen".