3213561631 has 8 divisors (see below), whose sum is σ = 3686196224. Its totient is φ = 2744315640.

The previous prime is 3213561583. The next prime is 3213561641. The reversal of 3213561631 is 1361653123.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3213561631 is a prime.

It is a super-2 number, since 2×3213561631² = 20653956712470760322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3213561593 and 3213561602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213561641) 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, 845115 + ... + 848908.

It is an arithmetic number, because the mean of its divisors is an integer number (460774528).

Almost surely, 2^3213561631 is an apocalyptic number.

3213561631 is a deficient number, since it is larger than the sum of its proper divisors (472634593).

3213561631 is a wasteful number, since it uses less digits than its factorization.

3213561631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694301.

The product of its digits is 9720, while the sum is 31.

The square root of 3213561631 is about 56688.2847773682. The cubic root of 3213561631 is about 1475.6913937233.

The spelling of 3213561631 in words is "three billion, two hundred thirteen million, five hundred sixty-one thousand, six hundred thirty-one".