245216331 has 12 divisors (see below), whose sum is σ = 360205560. Its totient is φ = 160706400.

The previous prime is 245216329. The next prime is 245216333. The reversal of 245216331 is 133612542.

245216331 is a `hidden beast` number, since 2 + 4 + 5 + 21 + 633 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (245216329) and next prime (245216333).

It is not a de Polignac number, because 245216331 - 2¹ = 245216329 is a prime.

It is a super-2 number, since 2×245216331² = 120262097978203122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 245216295 and 245216304.

It is not an unprimeable number, because it can be changed into a prime (245216333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230370 + ... + 231431.

It is an arithmetic number, because the mean of its divisors is an integer number (30017130).

Almost surely, 2^245216331 is an apocalyptic number.

245216331 is a deficient number, since it is larger than the sum of its proper divisors (114989229).

245216331 is a wasteful number, since it uses less digits than its factorization.

245216331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461866 (or 461863 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 245216331 is about 15659.3847580293. The cubic root of 245216331 is about 625.9165909073.

Adding to 245216331 its reverse (133612542), we get a palindrome (378828873).

The spelling of 245216331 in words is "two hundred forty-five million, two hundred sixteen thousand, three hundred thirty-one".