3722867521 has 4 divisors (see below), whose sum is σ = 3723016752. Its totient is φ = 3722718292.

The previous prime is 3722867513. The next prime is 3722867537. The reversal of 3722867521 is 1257682273.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3722867521 - 2³ = 3722867513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3722867821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27115 + ... + 90448.

It is an arithmetic number, because the mean of its divisors is an integer number (930754188).

Almost surely, 2^3722867521 is an apocalyptic number.

It is an amenable number.

3722867521 is a deficient number, since it is larger than the sum of its proper divisors (149231).

3722867521 is a wasteful number, since it uses less digits than its factorization.

3722867521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149230.

The product of its digits is 282240, while the sum is 43.

The square root of 3722867521 is about 61015.3056289977. The cubic root of 3722867521 is about 1549.8602053597.

The spelling of 3722867521 in words is "three billion, seven hundred twenty-two million, eight hundred sixty-seven thousand, five hundred twenty-one".