61113631 has 2 divisors, whose sum is σ = 61113632. Its totient is φ = 61113630.

The previous prime is 61113607. The next prime is 61113641. The reversal of 61113631 is 13631116.

It is a happy number.

61113631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61113631 - 2¹⁵ = 61080863 is a prime.

It is a super-2 number, since 2×61113631² = 7469751788008322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61113641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30556815 + 30556816.

It is an arithmetic number, because the mean of its divisors is an integer number (30556816).

Almost surely, 2^61113631 is an apocalyptic number.

61113631 is a deficient number, since it is larger than the sum of its proper divisors (1).

61113631 is an equidigital number, since it uses as much as digits as its factorization.

61113631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 22.

The square root of 61113631 is about 7817.5207706792. The cubic root of 61113631 is about 393.8939973537.

Adding to 61113631 its reverse (13631116), we get a palindrome (74744747).

The spelling of 61113631 in words is "sixty-one million, one hundred thirteen thousand, six hundred thirty-one".