321613061 has 16 divisors (see below), whose sum is σ = 410755968. Its totient is φ = 244492800.

The previous prime is 321613043. The next prime is 321613067. The reversal of 321613061 is 160316123.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321613061 is a prime.

It is a super-2 number, since 2×321613061² = 206869922011579442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321613067) 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, 47780 + ... + 54093.

It is an arithmetic number, because the mean of its divisors is an integer number (25672248).

Almost surely, 2^321613061 is an apocalyptic number.

It is an amenable number.

321613061 is a deficient number, since it is larger than the sum of its proper divisors (89142907).

321613061 is a wasteful number, since it uses less digits than its factorization.

321613061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101932.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 321613061 is about 17933.5735702620. The cubic root of 321613061 is about 685.1377427373.

Adding to 321613061 its reverse (160316123), we get a palindrome (481929184).

The spelling of 321613061 in words is "three hundred twenty-one million, six hundred thirteen thousand, sixty-one".