2621261023 has 2 divisors, whose sum is σ = 2621261024. Its totient is φ = 2621261022.

The previous prime is 2621260997. The next prime is 2621261029. The reversal of 2621261023 is 3201621262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2621261023 - 2⁹ = 2621260511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2621261029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310630511 + 1310630512.

It is an arithmetic number, because the mean of its divisors is an integer number (1310630512).

Almost surely, 2^2621261023 is an apocalyptic number.

2621261023 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621261023 is an equidigital number, since it uses as much as digits as its factorization.

2621261023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2621261023 is about 51198.2521479005. The cubic root of 2621261023 is about 1378.8068211652.

Adding to 2621261023 its reverse (3201621262), we get a palindrome (5822882285).

The spelling of 2621261023 in words is "two billion, six hundred twenty-one million, two hundred sixty-one thousand, twenty-three".