61315013 has 2 divisors, whose sum is σ = 61315014. Its totient is φ = 61315012.

The previous prime is 61315003. The next prime is 61315069. The reversal of 61315013 is 31051316.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54434884 + 6880129 = 7378^2 + 2623^2 .

It is a cyclic number.

It is not a de Polignac number, because 61315013 - 2⁴ = 61314997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61315003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30657506 + 30657507.

It is an arithmetic number, because the mean of its divisors is an integer number (30657507).

Almost surely, 2^61315013 is an apocalyptic number.

It is an amenable number.

61315013 is a deficient number, since it is larger than the sum of its proper divisors (1).

61315013 is an equidigital number, since it uses as much as digits as its factorization.

61315013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 61315013 is about 7830.3903478690. The cubic root of 61315013 is about 394.3261769406.

Adding to 61315013 its reverse (31051316), we get a palindrome (92366329).

The spelling of 61315013 in words is "sixty-one million, three hundred fifteen thousand, thirteen".