61980211 has 2 divisors, whose sum is σ = 61980212. Its totient is φ = 61980210.

The previous prime is 61980179. The next prime is 61980227. The reversal of 61980211 is 11208916.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61980211 - 2⁵ = 61980179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61980211.

It is not a weakly prime, because it can be changed into another prime (61980241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30990105 + 30990106.

It is an arithmetic number, because the mean of its divisors is an integer number (30990106).

Almost surely, 2^61980211 is an apocalyptic number.

61980211 is a deficient number, since it is larger than the sum of its proper divisors (1).

61980211 is an equidigital number, since it uses as much as digits as its factorization.

61980211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 61980211 is about 7872.7511709694. The cubic root of 61980211 is about 395.7470474995.

The spelling of 61980211 in words is "sixty-one million, nine hundred eighty thousand, two hundred eleven".