3706224521 has 4 divisors (see below), whose sum is σ = 3707078352. Its totient is φ = 3705370692.

The previous prime is 3706224503. The next prime is 3706224539. The reversal of 3706224521 is 1254226073.

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 an interprime number because it is at equal distance from previous prime (3706224503) and next prime (3706224539).

It is a cyclic number.

It is not a de Polignac number, because 3706224521 - 2²² = 3702030217 is a prime.

It is a super-2 number, since 2×3706224521² = 27472200400123358882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3706224551) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 420371 + ... + 429096.

It is an arithmetic number, because the mean of its divisors is an integer number (926769588).

Almost surely, 2^3706224521 is an apocalyptic number.

It is an amenable number.

3706224521 is a deficient number, since it is larger than the sum of its proper divisors (853831).

3706224521 is an equidigital number, since it uses as much as digits as its factorization.

3706224521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853830.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 3706224521 is about 60878.7690496449. The cubic root of 3706224521 is about 1547.5472161868.

The spelling of 3706224521 in words is "three billion, seven hundred six million, two hundred twenty-four thousand, five hundred twenty-one".