25253545321 has 8 divisors (see below), whose sum is σ = 25638261704. Its totient is φ = 24869877120.

The previous prime is 25253545309. The next prime is 25253545333. The reversal of 25253545321 is 12354535252.

It is an interprime number because it is at equal distance from previous prime (25253545309) and next prime (25253545333).

It can be written as a sum of positive squares in 4 ways, for example, as 7079539600 + 18174005721 = 84140^2 + 134811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25253545321 - 2²¹ = 25251448169 is a prime.

It is a super-3 number, since 3×25253545321³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25253545301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213426 + ... + 309931.

It is an arithmetic number, because the mean of its divisors is an integer number (3204782713).

Almost surely, 2^25253545321 is an apocalyptic number.

It is an amenable number.

25253545321 is a deficient number, since it is larger than the sum of its proper divisors (384716383).

25253545321 is an equidigital number, since it uses as much as digits as its factorization.

25253545321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524091.

The product of its digits is 180000, while the sum is 37.

The spelling of 25253545321 in words is "twenty-five billion, two hundred fifty-three million, five hundred forty-five thousand, three hundred twenty-one".