4150020521 has 4 divisors (see below), whose sum is σ = 4171523412. Its totient is φ = 4128517632.

The previous prime is 4150020493. The next prime is 4150020541. The reversal of 4150020521 is 1250200514.

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 3016755625 + 1133264896 = 54925^2 + 33664^2 .

It is a cyclic number.

It is not a de Polignac number, because 4150020521 - 2¹⁸ = 4149758377 is a prime.

It is a super-2 number, since 2×4150020521² = 34445340649442222882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4150020493 and 4150020502.

It is not an unprimeable number, because it can be changed into a prime (4150020541) 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, 10751156 + ... + 10751541.

It is an arithmetic number, because the mean of its divisors is an integer number (1042880853).

Almost surely, 2^4150020521 is an apocalyptic number.

It is an amenable number.

4150020521 is a deficient number, since it is larger than the sum of its proper divisors (21502891).

4150020521 is a wasteful number, since it uses less digits than its factorization.

4150020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21502890.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 4150020521 is about 64420.6529072781. The cubic root of 4150020521 is about 1607.0032240649.

The spelling of 4150020521 in words is "four billion, one hundred fifty million, twenty thousand, five hundred twenty-one".