245541213 has 20 divisors (see below), whose sum is σ = 376714140. Its totient is φ = 159268032.

The previous prime is 245541211. The next prime is 245541221. The reversal of 245541213 is 312145542.

245541213 is a `hidden beast` number, since 245 + 5 + 412 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 141562404 + 103978809 = 11898^2 + 10197^2 .

It is not a de Polignac number, because 245541213 - 2¹ = 245541211 is a prime.

It is a super-2 number, since 2×245541213² = 120580974563022738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245541211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37968 + ... + 43961.

It is an arithmetic number, because the mean of its divisors is an integer number (18835707).

Almost surely, 2^245541213 is an apocalyptic number.

It is an amenable number.

245541213 is a deficient number, since it is larger than the sum of its proper divisors (131172927).

245541213 is an equidigital number, since it uses as much as digits as its factorization.

245541213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81978 (or 81969 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 245541213 is about 15669.7547204798. The cubic root of 245541213 is about 626.1928901989.

Adding to 245541213 its reverse (312145542), we get a palindrome (557686755).

The spelling of 245541213 in words is "two hundred forty-five million, five hundred forty-one thousand, two hundred thirteen".