61575313 has 2 divisors, whose sum is σ = 61575314. Its totient is φ = 61575312.

The previous prime is 61575307. The next prime is 61575329. The reversal of 61575313 is 31357516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48274704 + 13300609 = 6948^2 + 3647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61575313 is a prime.

It is not a weakly prime, because it can be changed into another prime (61575383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30787656 + 30787657.

It is an arithmetic number, because the mean of its divisors is an integer number (30787657).

Almost surely, 2^61575313 is an apocalyptic number.

It is an amenable number.

61575313 is a deficient number, since it is larger than the sum of its proper divisors (1).

61575313 is an equidigital number, since it uses as much as digits as its factorization.

61575313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9450, while the sum is 31.

The square root of 61575313 is about 7846.9938830102. The cubic root of 61575313 is about 394.8833987940.

The spelling of 61575313 in words is "sixty-one million, five hundred seventy-five thousand, three hundred thirteen".