61613133 has 8 divisors (see below), whose sum is σ = 83377248. Its totient is φ = 40462224.

The previous prime is 61613107. The next prime is 61613171. The reversal of 61613133 is 33131616.

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

It is not a de Polignac number, because 61613133 - 2¹³ = 61604941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61613183) 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, 153066 + ... + 153467.

It is an arithmetic number, because the mean of its divisors is an integer number (10422156).

Almost surely, 2^61613133 is an apocalyptic number.

It is an amenable number.

61613133 is a deficient number, since it is larger than the sum of its proper divisors (21764115).

61613133 is a wasteful number, since it uses less digits than its factorization.

61613133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306603.

The product of its digits is 972, while the sum is 24.

The square root of 61613133 is about 7849.4033531218. The cubic root of 61613133 is about 394.9642289884.

Adding to 61613133 its reverse (33131616), we get a palindrome (94744749).

The spelling of 61613133 in words is "sixty-one million, six hundred thirteen thousand, one hundred thirty-three".