61302681 has 24 divisors (see below), whose sum is σ = 96960864. Its totient is φ = 37013760.

The previous prime is 61302653. The next prime is 61302707. The reversal of 61302681 is 18620316.

It is not a de Polignac number, because 61302681 - 2¹³ = 61294489 is a prime.

It is a super-2 number, since 2×61302681² = 7516037395575522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61302641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29385 + ... + 31401.

It is an arithmetic number, because the mean of its divisors is an integer number (4040036).

Almost surely, 2^61302681 is an apocalyptic number.

It is an amenable number.

61302681 is a deficient number, since it is larger than the sum of its proper divisors (35658183).

61302681 is a wasteful number, since it uses less digits than its factorization.

61302681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341 (or 2338 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 61302681 is about 7829.6028634919. The cubic root of 61302681 is about 394.2997388454.

Adding to 61302681 its reverse (18620316), we get a palindrome (79922997).

The spelling of 61302681 in words is "sixty-one million, three hundred two thousand, six hundred eighty-one".