245431140 has 24 divisors (see below), whose sum is σ = 687207360. Its totient is φ = 65448288.

The previous prime is 245431139. The next prime is 245431163. The reversal of 245431140 is 41134542.

It is a self number, because there is not a number n which added to its sum of digits gives 245431140.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2045200 + ... + 2045319.

It is an arithmetic number, because the mean of its divisors is an integer number (28633640).

Almost surely, 2^245431140 is an apocalyptic number.

245431140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245431140 is an abundant number, since it is smaller than the sum of its proper divisors (441776220).

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

245431140 is a wasteful number, since it uses less digits than its factorization.

245431140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4090531 (or 4090529 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 245431140 is about 15666.2420509834. The cubic root of 245431140 is about 626.0993047794.

Adding to 245431140 its reverse (41134542), we get a palindrome (286565682).

The spelling of 245431140 in words is "two hundred forty-five million, four hundred thirty-one thousand, one hundred forty".