61420213 has 2 divisors, whose sum is σ = 61420214. Its totient is φ = 61420212.

The previous prime is 61420199. The next prime is 61420223. The reversal of 61420213 is 31202416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55383364 + 6036849 = 7442^2 + 2457^2 .

It is a cyclic number.

It is not a de Polignac number, because 61420213 - 2⁵ = 61420181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61420223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30710106 + 30710107.

It is an arithmetic number, because the mean of its divisors is an integer number (30710107).

Almost surely, 2^61420213 is an apocalyptic number.

It is an amenable number.

61420213 is a deficient number, since it is larger than the sum of its proper divisors (1).

61420213 is an equidigital number, since it uses as much as digits as its factorization.

61420213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 61420213 is about 7837.1048863723. The cubic root of 61420213 is about 394.5515671551.

Adding to 61420213 its reverse (31202416), we get a palindrome (92622629).

The spelling of 61420213 in words is "sixty-one million, four hundred twenty thousand, two hundred thirteen".