383225021 has 4 divisors (see below), whose sum is σ = 393582492. Its totient is φ = 372867552.

The previous prime is 383224979. The next prime is 383225077. The reversal of 383225021 is 120522383.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 324396121 + 58828900 = 18011^2 + 7670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-383225021 is a prime.

It is a super-2 number, since 2×383225021² = 293722833440900882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383225221) 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, 5178680 + ... + 5178753.

It is an arithmetic number, because the mean of its divisors is an integer number (98395623).

Almost surely, 2^383225021 is an apocalyptic number.

It is an amenable number.

383225021 is a deficient number, since it is larger than the sum of its proper divisors (10357471).

383225021 is a wasteful number, since it uses less digits than its factorization.

383225021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10357470.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 383225021 is about 19576.1339646009. The cubic root of 383225021 is about 726.3589389679.

The spelling of 383225021 in words is "three hundred eighty-three million, two hundred twenty-five thousand, twenty-one".