61228113 has 4 divisors (see below), whose sum is σ = 81637488. Its totient is φ = 40818740.

The previous prime is 61228061. The next prime is 61228117. The reversal of 61228113 is 31182216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61228113 - 2⁸ = 61227857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61228117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10204683 + ... + 10204688.

It is an arithmetic number, because the mean of its divisors is an integer number (20409372).

Almost surely, 2^61228113 is an apocalyptic number.

It is an amenable number.

61228113 is a deficient number, since it is larger than the sum of its proper divisors (20409375).

61228113 is a wasteful number, since it uses less digits than its factorization.

61228113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20409374.

The product of its digits is 576, while the sum is 24.

The square root of 61228113 is about 7824.8394871716. The cubic root of 61228113 is about 394.1397998236.

The spelling of 61228113 in words is "sixty-one million, two hundred twenty-eight thousand, one hundred thirteen".