61824281 has 8 divisors (see below), whose sum is σ = 62563200. Its totient is φ = 61089840.

The previous prime is 61824263. The next prime is 61824283. The reversal of 61824281 is 18242816.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61824281 is a prime.

It is a super-2 number, since 2×61824281² = 7644483442333922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61824283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32291 + ... + 34151.

It is an arithmetic number, because the mean of its divisors is an integer number (7820400).

Almost surely, 2^61824281 is an apocalyptic number.

It is an amenable number.

61824281 is a deficient number, since it is larger than the sum of its proper divisors (738919).

61824281 is a wasteful number, since it uses less digits than its factorization.

61824281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239.

The product of its digits is 6144, while the sum is 32.

The square root of 61824281 is about 7862.8417890735. The cubic root of 61824281 is about 395.4148949320.

The spelling of 61824281 in words is "sixty-one million, eight hundred twenty-four thousand, two hundred eighty-one".