2021541431 has 16 divisors (see below), whose sum is σ = 2489121600. Its totient is φ = 1598773248.

The previous prime is 2021541421. The next prime is 2021541437. The reversal of 2021541431 is 1341451202.

It is a cyclic number.

It is not a de Polignac number, because 2021541431 - 2²² = 2017347127 is a prime.

It is a super-2 number, since 2×2021541431² = 8173259514499055522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021541397 and 2021541406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021541437) 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, 360215 + ... + 365783.

It is an arithmetic number, because the mean of its divisors is an integer number (155570100).

Almost surely, 2^2021541431 is an apocalyptic number.

2021541431 is a deficient number, since it is larger than the sum of its proper divisors (467580169).

2021541431 is a wasteful number, since it uses less digits than its factorization.

2021541431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9578.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2021541431 is about 44961.5550331614. Note that the first 3 decimals coincide. The cubic root of 2021541431 is about 1264.4283232934.

Adding to 2021541431 its reverse (1341451202), we get a palindrome (3362992633).

The spelling of 2021541431 in words is "two billion, twenty-one million, five hundred forty-one thousand, four hundred thirty-one".