61005131 has 8 divisors (see below), whose sum is σ = 69444864. Its totient is φ = 53047720.

The previous prime is 61005127. The next prime is 61005137. The reversal of 61005131 is 13150016.

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

It is not a de Polignac number, because 61005131 - 2² = 61005127 is a prime.

It is a super-2 number, since 2×61005131² = 7443252016654322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61005137) 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, 120311 + ... + 120816.

It is an arithmetic number, because the mean of its divisors is an integer number (8680608).

Almost surely, 2^61005131 is an apocalyptic number.

61005131 is a deficient number, since it is larger than the sum of its proper divisors (8439733).

61005131 is a wasteful number, since it uses less digits than its factorization.

61005131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241161.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 61005131 is about 7810.5781476149. The cubic root of 61005131 is about 393.6607552505.

Adding to 61005131 its reverse (13150016), we get a palindrome (74155147).

The spelling of 61005131 in words is "sixty-one million, five thousand, one hundred thirty-one".