245231351240 has 64 divisors (see below), whose sum is σ = 565115918400. Its totient is φ = 95724179712.

The previous prime is 245231351221. The next prime is 245231351273. The reversal of 245231351240 is 42153132542.

It is a junction number, because it is equal to n+sod(n) for n = 245231351197 and 245231351206.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1843199 + ... + 1971761.

It is an arithmetic number, because the mean of its divisors is an integer number (8829936225).

Almost surely, 2^245231351240 is an apocalyptic number.

245231351240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245231351240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282557959200).

245231351240 is an abundant number, since it is smaller than the sum of its proper divisors (319884567160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245231351240 is a wasteful number, since it uses less digits than its factorization.

245231351240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129726 (or 129722 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 245231351240 its reverse (42153132542), we get a palindrome (287384483782).

The spelling of 245231351240 in words is "two hundred forty-five billion, two hundred thirty-one million, three hundred fifty-one thousand, two hundred forty".