3136648021 has 16 divisors (see below), whose sum is σ = 3434482800. Its totient is φ = 2847283200.

The previous prime is 3136647971. The next prime is 3136648049. The reversal of 3136648021 is 1208466313.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 681940996 + 2454707025 = 26114^2 + 49545^2 .

It is a cyclic number.

It is not a de Polignac number, because 3136648021 - 2¹³ = 3136639829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3136648061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187621 + ... + 203653.

It is an arithmetic number, because the mean of its divisors is an integer number (214655175).

Almost surely, 2^3136648021 is an apocalyptic number.

It is an amenable number.

3136648021 is a deficient number, since it is larger than the sum of its proper divisors (297834779).

3136648021 is a wasteful number, since it uses less digits than its factorization.

3136648021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16296.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 3136648021 is about 56005.7856029178. The cubic root of 3136648021 is about 1463.8230979390.

The spelling of 3136648021 in words is "three billion, one hundred thirty-six million, six hundred forty-eight thousand, twenty-one".