245531137447 has 4 divisors (see below), whose sum is σ = 248894577760. Its totient is φ = 242167697136.

The previous prime is 245531137441. The next prime is 245531137451. The reversal of 245531137447 is 744731135542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744731135542 = 2 ⋅372365567771.

It is a cyclic number.

It is not a de Polignac number, because 245531137447 - 2²³ = 245522748839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245531137397 and 245531137406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245531137441) 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, 1681720047 + ... + 1681720192.

It is an arithmetic number, because the mean of its divisors is an integer number (62223644440).

Almost surely, 2^245531137447 is an apocalyptic number.

245531137447 is a deficient number, since it is larger than the sum of its proper divisors (3363440313).

245531137447 is an equidigital number, since it uses as much as digits as its factorization.

245531137447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363440312.

The product of its digits is 1411200, while the sum is 46.

The spelling of 245531137447 in words is "two hundred forty-five billion, five hundred thirty-one million, one hundred thirty-seven thousand, four hundred forty-seven".