61281363 has 32 divisors (see below), whose sum is σ = 96590592. Its totient is φ = 34070400.

The previous prime is 61281343. The next prime is 61281371. The reversal of 61281363 is 36318216.

61281363 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61281363 - 2⁶ = 61281299 is a prime.

It is a super-2 number, since 2×61281363² = 7510810902275538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61281363.

It is not an unprimeable number, because it can be changed into a prime (61281313) 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 31 ways as a sum of consecutive naturals, for example, 90181 + ... + 90857.

It is an arithmetic number, because the mean of its divisors is an integer number (3018456).

Almost surely, 2^61281363 is an apocalyptic number.

61281363 is a deficient number, since it is larger than the sum of its proper divisors (35309229).

61281363 is a wasteful number, since it uses less digits than its factorization.

61281363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915.

The product of its digits is 5184, while the sum is 30.

The square root of 61281363 is about 7828.2413733865. The cubic root of 61281363 is about 394.2540276506.

Adding to 61281363 its reverse (36318216), we get a palindrome (97599579).

The spelling of 61281363 in words is "sixty-one million, two hundred eighty-one thousand, three hundred sixty-three".