61513313 has 4 divisors (see below), whose sum is σ = 61529520. Its totient is φ = 61497108.

The previous prime is 61513307. The next prime is 61513373. The reversal of 61513313 is 31331516.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61513313 - 2⁴ = 61513297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61513373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998 + ... + 11136.

It is an arithmetic number, because the mean of its divisors is an integer number (15382380).

Almost surely, 2^61513313 is an apocalyptic number.

It is an amenable number.

61513313 is a deficient number, since it is larger than the sum of its proper divisors (16207).

61513313 is a wasteful number, since it uses less digits than its factorization.

61513313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16206.

The product of its digits is 810, while the sum is 23.

The square root of 61513313 is about 7843.0423306266. The cubic root of 61513313 is about 394.7508186449.

Adding to 61513313 its reverse (31331516), we get a palindrome (92844829).

The spelling of 61513313 in words is "sixty-one million, five hundred thirteen thousand, three hundred thirteen".