2521133243 has 4 divisors (see below), whose sum is σ = 2523078360. Its totient is φ = 2519188128.

The previous prime is 2521133231. The next prime is 2521133287. The reversal of 2521133243 is 3423311252.

It is a happy number.

2521133243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2521133243 - 2⁸ = 2521132987 is a prime.

It is a super-2 number, since 2×2521133243² = 12712225657919394098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521133213) 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, 970613 + ... + 973206.

It is an arithmetic number, because the mean of its divisors is an integer number (630769590).

Almost surely, 2^2521133243 is an apocalyptic number.

2521133243 is a deficient number, since it is larger than the sum of its proper divisors (1945117).

2521133243 is a wasteful number, since it uses less digits than its factorization.

2521133243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945116.

The product of its digits is 4320, while the sum is 26.

The square root of 2521133243 is about 50210.8876938060. The cubic root of 2521133243 is about 1361.0223791224.

Adding to 2521133243 its reverse (3423311252), we get a palindrome (5944444495).

The spelling of 2521133243 in words is "two billion, five hundred twenty-one million, one hundred thirty-three thousand, two hundred forty-three".