2521133401 has 2 divisors, whose sum is σ = 2521133402. Its totient is φ = 2521133400.

The previous prime is 2521133359. The next prime is 2521133423. The reversal of 2521133401 is 1043311252.

It is a happy number.

It is an a-pointer prime, because the next prime (2521133423) can be obtained adding 2521133401 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2141468176 + 379665225 = 46276^2 + 19485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521133401 - 2¹³ = 2521125209 is a prime.

It is a super-2 number, since 2×2521133401² = 12712227251275653602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2521133441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260566700 + 1260566701.

It is an arithmetic number, because the mean of its divisors is an integer number (1260566701).

Almost surely, 2^2521133401 is an apocalyptic number.

It is an amenable number.

2521133401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521133401 is an equidigital number, since it uses as much as digits as its factorization.

2521133401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2521133401 is about 50210.8892671699. The cubic root of 2521133401 is about 1361.0224075543.

Adding to 2521133401 its reverse (1043311252), we get a palindrome (3564444653).

The spelling of 2521133401 in words is "two billion, five hundred twenty-one million, one hundred thirty-three thousand, four hundred one".