61102191 has 16 divisors (see below), whose sum is σ = 86287104. Its totient is φ = 38379264.

The previous prime is 61102141. The next prime is 61102201. The reversal of 61102191 is 19120116.

It is not a de Polignac number, because 61102191 - 2⁹ = 61101679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61102121) 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, 1986 + ... + 11231.

It is an arithmetic number, because the mean of its divisors is an integer number (5392944).

Almost surely, 2^61102191 is an apocalyptic number.

61102191 is a deficient number, since it is larger than the sum of its proper divisors (25184913).

61102191 is a wasteful number, since it uses less digits than its factorization.

61102191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13310.

The product of its (nonzero) digits is 108, while the sum is 21.

The square root of 61102191 is about 7816.7890466610. The cubic root of 61102191 is about 393.8694178479.

The spelling of 61102191 in words is "sixty-one million, one hundred two thousand, one hundred ninety-one".