245120313131 has 4 divisors (see below), whose sum is σ = 245152972872. Its totient is φ = 245087653392.

The previous prime is 245120313127. The next prime is 245120313227. The reversal of 245120313131 is 131313021542.

245120313131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131313021542 = 2 ⋅65656510771.

It is a cyclic number.

It is not a de Polignac number, because 245120313131 - 2² = 245120313127 is a prime.

It is a super-2 number, since 2×245120313131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245120313131.

It is not an unprimeable number, because it can be changed into a prime (245120313331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16318610 + ... + 16333623.

It is an arithmetic number, because the mean of its divisors is an integer number (61288243218).

Almost surely, 2^245120313131 is an apocalyptic number.

245120313131 is a deficient number, since it is larger than the sum of its proper divisors (32659741).

245120313131 is an equidigital number, since it uses as much as digits as its factorization.

245120313131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32659740.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 245120313131 its reverse (131313021542), we get a palindrome (376433334673).

The spelling of 245120313131 in words is "two hundred forty-five billion, one hundred twenty million, three hundred thirteen thousand, one hundred thirty-one".