245642031 has 8 divisors (see below), whose sum is σ = 363914160. Its totient is φ = 163761336.

The previous prime is 245642017. The next prime is 245642039. The reversal of 245642031 is 130246542.

245642031 is a `hidden beast` number, since 2 + 456 + 4 + 203 + 1 = 666.

It is not a de Polignac number, because 245642031 - 2¹⁷ = 245510959 is a prime.

It is a super-2 number, since 2×245642031² = 120680014787609922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9097853 = 245642031 / (2 + 4 + 5 + 6 + 4 + 2 + 0 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 245641986 and 245642004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245642039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4548900 + ... + 4548953.

It is an arithmetic number, because the mean of its divisors is an integer number (45489270).

Almost surely, 2^245642031 is an apocalyptic number.

245642031 is a deficient number, since it is larger than the sum of its proper divisors (118272129).

245642031 is an equidigital number, since it uses as much as digits as its factorization.

245642031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9097862 (or 9097856 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 245642031 is about 15672.9713519805. The cubic root of 245642031 is about 626.2785823664.

Adding to 245642031 its reverse (130246542), we get a palindrome (375888573).

The spelling of 245642031 in words is "two hundred forty-five million, six hundred forty-two thousand, thirty-one".