245505403121131 has 24 divisors (see below), whose sum is σ = 267409096143840. Its totient is φ = 225215724518400.

The previous prime is 245505403121059. The next prime is 245505403121203. The reversal of 245505403121131 is 131121304505542.

It is an interprime number because it is at equal distance from previous prime (245505403121059) and next prime (245505403121203).

It is not a de Polignac number, because 245505403121131 - 2¹¹ = 245505403119083 is a prime.

It is a super-2 number, since 2×245505403121131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245505400121131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2807650 + ... + 22335928.

It is an arithmetic number, because the mean of its divisors is an integer number (11142045672660).

Almost surely, 2^{245505403121131} is an apocalyptic number.

245505403121131 is a deficient number, since it is larger than the sum of its proper divisors (21903693022709).

245505403121131 is a wasteful number, since it uses less digits than its factorization.

245505403121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19529415 (or 19529398 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 245505403121131 its reverse (131121304505542), we get a palindrome (376626707626673).

The spelling of 245505403121131 in words is "two hundred forty-five trillion, five hundred five billion, four hundred three million, one hundred twenty-one thousand, one hundred thirty-one".