61220332253 has 2 divisors, whose sum is σ = 61220332254. Its totient is φ = 61220332252.

The previous prime is 61220332249. The next prime is 61220332279. The reversal of 61220332253 is 35223302216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50921532964 + 10298799289 = 225658^2 + 101483^2 .

It is a cyclic number.

It is not a de Polignac number, because 61220332253 - 2² = 61220332249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61220332213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30610166126 + 30610166127.

It is an arithmetic number, because the mean of its divisors is an integer number (30610166127).

Almost surely, 2^61220332253 is an apocalyptic number.

It is an amenable number.

61220332253 is a deficient number, since it is larger than the sum of its proper divisors (1).

61220332253 is an equidigital number, since it uses as much as digits as its factorization.

61220332253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 61220332253 its reverse (35223302216), we get a palindrome (96443634469).

The spelling of 61220332253 in words is "sixty-one billion, two hundred twenty million, three hundred thirty-two thousand, two hundred fifty-three".