61217133 has 16 divisors (see below), whose sum is σ = 82543296. Its totient is φ = 40354560.

The previous prime is 61217131. The next prime is 61217147. The reversal of 61217133 is 33171216.

It is not a de Polignac number, because 61217133 - 2¹ = 61217131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61217131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163935 + ... + 164307.

It is an arithmetic number, because the mean of its divisors is an integer number (5158956).

Almost surely, 2^61217133 is an apocalyptic number.

It is an amenable number.

61217133 is a deficient number, since it is larger than the sum of its proper divisors (21326163).

61217133 is a wasteful number, since it uses less digits than its factorization.

61217133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its digits is 756, while the sum is 24.

The square root of 61217133 is about 7824.1378438778. The cubic root of 61217133 is about 394.1162381322.

Adding to 61217133 its reverse (33171216), we get a palindrome (94388349).

The spelling of 61217133 in words is "sixty-one million, two hundred seventeen thousand, one hundred thirty-three".