61111113 has 16 divisors (see below), whose sum is σ = 93434880. Its totient is φ = 34803216.

The previous prime is 61111111. The next prime is 61111121. The reversal of 61111113 is 31111116.

It is not a de Polignac number, because 61111113 - 2¹ = 61111111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61111092 and 61111101.

It is not an unprimeable number, because it can be changed into a prime (61111111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1708 + ... + 11186.

It is an arithmetic number, because the mean of its divisors is an integer number (5839680).

Almost surely, 2^61111113 is an apocalyptic number.

It is an amenable number.

61111113 is a deficient number, since it is larger than the sum of its proper divisors (32323767).

61111113 is a wasteful number, since it uses less digits than its factorization.

61111113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9796.

The product of its digits is 18, while the sum is 15.

The square root of 61111113 is about 7817.3597205195. The cubic root of 61111113 is about 393.8885875474. Note that the first 3 decimals are identical.

Adding to 61111113 its reverse (31111116), we get a palindrome (92222229).

The spelling of 61111113 in words is "sixty-one million, one hundred eleven thousand, one hundred thirteen".