2021041251 has 6 divisors (see below), whose sum is σ = 2919281820. Its totient is φ = 1347360828.

The previous prime is 2021041247. The next prime is 2021041259. The reversal of 2021041251 is 1521401202.

2021041251 is a `hidden beast` number, since 202 + 1 + 0 + 412 + 51 = 666.

It is not a de Polignac number, because 2021041251 - 2² = 2021041247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021041259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112280061 + ... + 112280078.

It is an arithmetic number, because the mean of its divisors is an integer number (486546970).

Almost surely, 2^2021041251 is an apocalyptic number.

2021041251 is a deficient number, since it is larger than the sum of its proper divisors (898240569).

2021041251 is a wasteful number, since it uses less digits than its factorization.

2021041251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224560145 (or 224560142 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2021041251 is about 44955.9923814390. The cubic root of 2021041251 is about 1264.3240309423.

Adding to 2021041251 its reverse (1521401202), we get a palindrome (3542442453).

The spelling of 2021041251 in words is "two billion, twenty-one million, forty-one thousand, two hundred fifty-one".