245215440031 has 4 divisors (see below), whose sum is σ = 251196304464. Its totient is φ = 239234575600.

The previous prime is 245215439957. The next prime is 245215440059. The reversal of 245215440031 is 130044512542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245215440031 - 2¹¹ = 245215437983 is a prime.

It is a super-2 number, since 2×245215440031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245215439975 and 245215440002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245215447031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2990432155 + ... + 2990432236.

It is an arithmetic number, because the mean of its divisors is an integer number (62799076116).

Almost surely, 2^245215440031 is an apocalyptic number.

245215440031 is a deficient number, since it is larger than the sum of its proper divisors (5980864433).

245215440031 is an equidigital number, since it uses as much as digits as its factorization.

245215440031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5980864432.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 245215440031 its reverse (130044512542), we get a palindrome (375259952573).

The spelling of 245215440031 in words is "two hundred forty-five billion, two hundred fifteen million, four hundred forty thousand, thirty-one".