61213253 has 2 divisors, whose sum is σ = 61213254. Its totient is φ = 61213252.

The previous prime is 61213249. The next prime is 61213261. The reversal of 61213253 is 35231216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61199329 + 13924 = 7823^2 + 118^2 .

It is a cyclic number.

It is not a de Polignac number, because 61213253 - 2² = 61213249 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61213153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30606626 + 30606627.

It is an arithmetic number, because the mean of its divisors is an integer number (30606627).

Almost surely, 2^61213253 is an apocalyptic number.

It is an amenable number.

61213253 is a deficient number, since it is larger than the sum of its proper divisors (1).

61213253 is an equidigital number, since it uses as much as digits as its factorization.

61213253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 61213253 is about 7823.8898893070. The cubic root of 61213253 is about 394.1079114692.

Adding to 61213253 its reverse (35231216), we get a palindrome (96444469).

The spelling of 61213253 in words is "sixty-one million, two hundred thirteen thousand, two hundred fifty-three".