245531140 has 24 divisors (see below), whose sum is σ = 519082200. Its totient is φ = 97552128.

The previous prime is 245531137. The next prime is 245531159. The reversal of 245531140 is 41135542.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25542916 + 219988224 = 5054^2 + 14832^2 .

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, 38217 + ... + 44176.

It is an arithmetic number, because the mean of its divisors is an integer number (21628425).

Almost surely, 2^245531140 is an apocalyptic number.

245531140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245531140 is an abundant number, since it is smaller than the sum of its proper divisors (273551060).

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

245531140 is a wasteful number, since it uses less digits than its factorization.

245531140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82551 (or 82549 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 245531140 is about 15669.4333018141. The cubic root of 245531140 is about 626.1843271731.

Adding to 245531140 its reverse (41135542), we get a palindrome (286666682).

The spelling of 245531140 in words is "two hundred forty-five million, five hundred thirty-one thousand, one hundred forty".