245040026321 has 4 divisors (see below), whose sum is σ = 245051109732. Its totient is φ = 245028942912.

The previous prime is 245040026303. The next prime is 245040026339. The reversal of 245040026321 is 123620040542.

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

It is an interprime number because it is at equal distance from previous prime (245040026303) and next prime (245040026339).

It can be written as a sum of positive squares in 2 ways, for example, as 67879007296 + 177161019025 = 260536^2 + 420905^2 .

It is a cyclic number.

It is not a de Polignac number, because 245040026321 - 2²² = 245035832017 is a prime.

It is a super-2 number, since 2×245040026321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245040026821) 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, 5508476 + ... + 5552781.

It is an arithmetic number, because the mean of its divisors is an integer number (61262777433).

Almost surely, 2^245040026321 is an apocalyptic number.

It is an amenable number.

245040026321 is a deficient number, since it is larger than the sum of its proper divisors (11083411).

245040026321 is a wasteful number, since it uses less digits than its factorization.

245040026321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11083410.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 245040026321 its reverse (123620040542), we get a palindrome (368660066863).

The spelling of 245040026321 in words is "two hundred forty-five billion, forty million, twenty-six thousand, three hundred twenty-one".