613320531 has 16 divisors (see below), whose sum is σ = 836857344. Its totient is φ = 399367584.

The previous prime is 613320511. The next prime is 613320557. The reversal of 613320531 is 135023316.

It is a happy number.

It is not a de Polignac number, because 613320531 - 2⁶ = 613320467 is a prime.

It is a super-2 number, since 2×613320531² = 752324147492243922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (613320511) 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, 69585 + ... + 77901.

It is an arithmetic number, because the mean of its divisors is an integer number (52303584).

Almost surely, 2^613320531 is an apocalyptic number.

613320531 is a deficient number, since it is larger than the sum of its proper divisors (223536813).

613320531 is a wasteful number, since it uses less digits than its factorization.

613320531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8890.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 613320531 is about 24765.3090229054. The cubic root of 613320531 is about 849.6286871855.

Adding to 613320531 its reverse (135023316), we get a palindrome (748343847).

The spelling of 613320531 in words is "six hundred thirteen million, three hundred twenty thousand, five hundred thirty-one".