3724221631 has 4 divisors (see below), whose sum is σ = 4010700232. Its totient is φ = 3437743032.

The previous prime is 3724221623. The next prime is 3724221661. The reversal of 3724221631 is 1361224273.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1361224273 = 79 ⋅17230687.

It is a cyclic number.

It is not a de Polignac number, because 3724221631 - 2³ = 3724221623 is a prime.

It is a super-2 number, since 2×3724221631² = 27739653513616600322, 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 = 3724221593 and 3724221602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3724221601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143239281 + ... + 143239306.

It is an arithmetic number, because the mean of its divisors is an integer number (1002675058).

Almost surely, 2^3724221631 is an apocalyptic number.

3724221631 is a deficient number, since it is larger than the sum of its proper divisors (286478601).

3724221631 is a wasteful number, since it uses less digits than its factorization.

3724221631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286478600.

The product of its digits is 12096, while the sum is 31.

The square root of 3724221631 is about 61026.4010982132. The cubic root of 3724221631 is about 1550.0480916053.

The spelling of 3724221631 in words is "three billion, seven hundred twenty-four million, two hundred twenty-one thousand, six hundred thirty-one".