61204513 has 4 divisors (see below), whose sum is σ = 62697348. Its totient is φ = 59711680.

The previous prime is 61204511. The next prime is 61204543. The reversal of 61204513 is 31540216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2712609 + 58491904 = 1647^2 + 7648^2 .

It is a cyclic number.

It is not a de Polignac number, because 61204513 - 2¹ = 61204511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61204511) 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, 746356 + ... + 746437.

It is an arithmetic number, because the mean of its divisors is an integer number (15674337).

Almost surely, 2^61204513 is an apocalyptic number.

It is an amenable number.

61204513 is a deficient number, since it is larger than the sum of its proper divisors (1492835).

61204513 is a wasteful number, since it uses less digits than its factorization.

61204513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492834.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 61204513 is about 7823.3313236754. The cubic root of 61204513 is about 394.0891537279.

Adding to 61204513 its reverse (31540216), we get a palindrome (92744729).

The spelling of 61204513 in words is "sixty-one million, two hundred four thousand, five hundred thirteen".