61198131 has 8 divisors (see below), whose sum is σ = 82054080. Its totient is φ = 40570472.

The previous prime is 61198127. The next prime is 61198153. The reversal of 61198131 is 13189116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61198131 - 2² = 61198127 is a prime.

It is a super-2 number, since 2×61198131² = 7490422475786322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61198831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56445 + ... + 57518.

It is an arithmetic number, because the mean of its divisors is an integer number (10256760).

Almost surely, 2^61198131 is an apocalyptic number.

61198131 is a deficient number, since it is larger than the sum of its proper divisors (20855949).

61198131 is a wasteful number, since it uses less digits than its factorization.

61198131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114145.

The product of its digits is 1296, while the sum is 30.

The square root of 61198131 is about 7822.9234305341. The cubic root of 61198131 is about 394.0754555855.

The spelling of 61198131 in words is "sixty-one million, one hundred ninety-eight thousand, one hundred thirty-one".