3215921742 has 48 divisors (see below), whose sum is σ = 7623338112. Its totient is φ = 971692560.

The previous prime is 3215921729. The next prime is 3215921771. The reversal of 3215921742 is 2471295123.

3215921742 is a `hidden beast` number, since 3 + 21 + 592 + 1 + 7 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 3215921697 and 3215921706.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45303 + ... + 92109.

It is an arithmetic number, because the mean of its divisors is an integer number (158819544).

Almost surely, 2^3215921742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3215921742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3811669056).

3215921742 is an abundant number, since it is smaller than the sum of its proper divisors (4407416370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3215921742 is a wasteful number, since it uses less digits than its factorization.

3215921742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47173 (or 47170 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 3215921742 is about 56709.0975241187. The cubic root of 3215921742 is about 1476.0525654930.

The spelling of 3215921742 in words is "three billion, two hundred fifteen million, nine hundred twenty-one thousand, seven hundred forty-two".