61553113 has 2 divisors, whose sum is σ = 61553114. Its totient is φ = 61553112.

The previous prime is 61553111. The next prime is 61553117. The reversal of 61553113 is 31135516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42994249 + 18558864 = 6557^2 + 4308^2 .

It is a cyclic number.

It is not a de Polignac number, because 61553113 - 2¹ = 61553111 is a prime.

Together with 61553111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61553111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30776556 + 30776557.

It is an arithmetic number, because the mean of its divisors is an integer number (30776557).

Almost surely, 2^61553113 is an apocalyptic number.

It is an amenable number.

61553113 is a deficient number, since it is larger than the sum of its proper divisors (1).

61553113 is an equidigital number, since it uses as much as digits as its factorization.

61553113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 25.

The square root of 61553113 is about 7845.5792010533. The cubic root of 61553113 is about 394.8359367795.

Adding to 61553113 its reverse (31135516), we get a palindrome (92688629).

The spelling of 61553113 in words is "sixty-one million, five hundred fifty-three thousand, one hundred thirteen".