425351231509 has 4 divisors (see below), whose sum is σ = 450371892204. Its totient is φ = 400330570816.

The previous prime is 425351231507. The next prime is 425351231581. The reversal of 425351231509 is 905132153524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 247058702500 + 178292529009 = 497050^2 + 422247^2 .

It is a cyclic number.

It is not a de Polignac number, because 425351231509 - 2¹ = 425351231507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425351231507) 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, 12510330322 + ... + 12510330355.

It is an arithmetic number, because the mean of its divisors is an integer number (112592973051).

Almost surely, 2^425351231509 is an apocalyptic number.

It is an amenable number.

425351231509 is a deficient number, since it is larger than the sum of its proper divisors (25020660695).

425351231509 is a wasteful number, since it uses less digits than its factorization.

425351231509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25020660694.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 425351231509 in words is "four hundred twenty-five billion, three hundred fifty-one million, two hundred thirty-one thousand, five hundred nine".