2258501261 has 4 divisors (see below), whose sum is σ = 2356696992. Its totient is φ = 2160305532.

The previous prime is 2258501239. The next prime is 2258501269. The reversal of 2258501261 is 1621058522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1621058522 = 2 ⋅810529261.

It is a cyclic number.

It is not a de Polignac number, because 2258501261 - 2¹⁸ = 2258239117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2258501269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49097831 + ... + 49097876.

It is an arithmetic number, because the mean of its divisors is an integer number (589174248).

Almost surely, 2^2258501261 is an apocalyptic number.

It is an amenable number.

2258501261 is a deficient number, since it is larger than the sum of its proper divisors (98195731).

2258501261 is an equidigital number, since it uses as much as digits as its factorization.

2258501261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98195730.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 2258501261 is about 47523.6915758867. The cubic root of 2258501261 is about 1312.0189641707.

Adding to 2258501261 its reverse (1621058522), we get a palindrome (3879559783).

The spelling of 2258501261 in words is "two billion, two hundred fifty-eight million, five hundred one thousand, two hundred sixty-one".