245130422521 has 4 divisors (see below), whose sum is σ = 245389272912. Its totient is φ = 244871572132.

The previous prime is 245130422519. The next prime is 245130422533. The reversal of 245130422521 is 125224031542.

It is a happy number.

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: 125224031542 = 2 ⋅62612015771.

It is a cyclic number.

It is not a de Polignac number, because 245130422521 - 2¹ = 245130422519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245130422921) 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, 129423775 + ... + 129425668.

It is an arithmetic number, because the mean of its divisors is an integer number (61347318228).

Almost surely, 2^245130422521 is an apocalyptic number.

It is an amenable number.

245130422521 is a deficient number, since it is larger than the sum of its proper divisors (258850391).

245130422521 is an equidigital number, since it uses as much as digits as its factorization.

245130422521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258850390.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 245130422521 in words is "two hundred forty-five billion, one hundred thirty million, four hundred twenty-two thousand, five hundred twenty-one".