245642331 has 16 divisors (see below), whose sum is σ = 360771840. Its totient is φ = 147426720.

The previous prime is 245642281. The next prime is 245642377. The reversal of 245642331 is 133246542.

245642331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 245642331 - 2¹⁹ = 245118043 is a prime.

It is a super-2 number, since 2×245642331² = 120680309558227122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (245642381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32736 + ... + 39533.

It is an arithmetic number, because the mean of its divisors is an integer number (22548240).

Almost surely, 2^245642331 is an apocalyptic number.

245642331 is a deficient number, since it is larger than the sum of its proper divisors (115129509).

245642331 is a wasteful number, since it uses less digits than its factorization.

245642331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72386.

The product of its digits is 17280, while the sum is 30.

The square root of 245642331 is about 15672.9809225941. The cubic root of 245642331 is about 626.2788373221.

Adding to 245642331 its reverse (133246542), we get a palindrome (378888873).

The spelling of 245642331 in words is "two hundred forty-five million, six hundred forty-two thousand, three hundred thirty-one".