61216583 has 2 divisors, whose sum is σ = 61216584. Its totient is φ = 61216582.

The previous prime is 61216549. The next prime is 61216591. The reversal of 61216583 is 38561216.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61216583 - 2¹⁴ = 61200199 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61216523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30608291 + 30608292.

It is an arithmetic number, because the mean of its divisors is an integer number (30608292).

Almost surely, 2^61216583 is an apocalyptic number.

61216583 is a deficient number, since it is larger than the sum of its proper divisors (1).

61216583 is an equidigital number, since it uses as much as digits as its factorization.

61216583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 61216583 is about 7824.1026961563. The cubic root of 61216583 is about 394.1150578277.

Adding to 61216583 its reverse (38561216), we get a palindrome (99777799).

The spelling of 61216583 in words is "sixty-one million, two hundred sixteen thousand, five hundred eighty-three".