61312253 has 2 divisors, whose sum is σ = 61312254. Its totient is φ = 61312252.

The previous prime is 61312249. The next prime is 61312271. The reversal of 61312253 is 35221316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58415449 + 2896804 = 7643^2 + 1702^2 .

It is a cyclic number.

It is not a de Polignac number, because 61312253 - 2² = 61312249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61312243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30656126 + 30656127.

It is an arithmetic number, because the mean of its divisors is an integer number (30656127).

Almost surely, 2^61312253 is an apocalyptic number.

It is an amenable number.

61312253 is a deficient number, since it is larger than the sum of its proper divisors (1).

61312253 is an equidigital number, since it uses as much as digits as its factorization.

61312253 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 61312253 is about 7830.2141094609. The cubic root of 61312253 is about 394.3202601919.

Adding to 61312253 its reverse (35221316), we get a palindrome (96533569).

The spelling of 61312253 in words is "sixty-one million, three hundred twelve thousand, two hundred fifty-three".