61113513 has 4 divisors (see below), whose sum is σ = 81484688. Its totient is φ = 40742340.

The previous prime is 61113509. The next prime is 61113517. The reversal of 61113513 is 31531116.

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 an interprime number because it is at equal distance from previous prime (61113509) and next prime (61113517).

It is not a de Polignac number, because 61113513 - 2² = 61113509 is a prime.

It is a super-2 number, since 2×61113513² = 7469722942402338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61113513.

It is not an unprimeable number, because it can be changed into a prime (61113517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10185583 + ... + 10185588.

It is an arithmetic number, because the mean of its divisors is an integer number (20371172).

Almost surely, 2^61113513 is an apocalyptic number.

It is an amenable number.

61113513 is a deficient number, since it is larger than the sum of its proper divisors (20371175).

61113513 is a wasteful number, since it uses less digits than its factorization.

61113513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20371174.

The product of its digits is 270, while the sum is 21.

The square root of 61113513 is about 7817.5132235258. The cubic root of 61113513 is about 393.8937438394.

Adding to 61113513 its reverse (31531116), we get a palindrome (92644629).

The spelling of 61113513 in words is "sixty-one million, one hundred thirteen thousand, five hundred thirteen".