61522213 has 2 divisors, whose sum is σ = 61522214. Its totient is φ = 61522212.

The previous prime is 61522211. The next prime is 61522261. The reversal of 61522213 is 31222516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56580484 + 4941729 = 7522^2 + 2223^2 .

It is a cyclic number.

It is not a de Polignac number, because 61522213 - 2¹ = 61522211 is a prime.

Together with 61522211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61522211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30761106 + 30761107.

It is an arithmetic number, because the mean of its divisors is an integer number (30761107).

Almost surely, 2^61522213 is an apocalyptic number.

It is an amenable number.

61522213 is a deficient number, since it is larger than the sum of its proper divisors (1).

61522213 is an equidigital number, since it uses as much as digits as its factorization.

61522213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 22.

The square root of 61522213 is about 7843.6096919722. The cubic root of 61522213 is about 394.7698557860.

Adding to 61522213 its reverse (31222516), we get a palindrome (92744729).

The spelling of 61522213 in words is "sixty-one million, five hundred twenty-two thousand, two hundred thirteen".