245431220 has 12 divisors (see below), whose sum is σ = 515405604. Its totient is φ = 98172480.

The previous prime is 245431213. The next prime is 245431231. The reversal of 245431220 is 22134542.

It is a happy number.

245431220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 105103504 + 140327716 = 10252^2 + 11846^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6135761 + ... + 6135800.

It is an arithmetic number, because the mean of its divisors is an integer number (42950467).

Almost surely, 2^245431220 is an apocalyptic number.

245431220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245431220 is an abundant number, since it is smaller than the sum of its proper divisors (269974384).

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

245431220 is a wasteful number, since it uses less digits than its factorization.

245431220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12271570 (or 12271568 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 245431220 is about 15666.2446042439. The cubic root of 245431220 is about 626.0993728066.

Adding to 245431220 its reverse (22134542), we get a palindrome (267565762).

The spelling of 245431220 in words is "two hundred forty-five million, four hundred thirty-one thousand, two hundred twenty".