245213512420 has 24 divisors (see below), whose sum is σ = 545239457784. Its totient is φ = 92315675136.

The previous prime is 245213512391. The next prime is 245213512429. The reversal of 245213512420 is 24215312542.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25260016356 + 219953496064 = 158934^2 + 468992^2 .

It is not an unprimeable number, because it can be changed into a prime (245213512429) 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, 360607767 + ... + 360608446.

It is an arithmetic number, because the mean of its divisors is an integer number (22718310741).

Almost surely, 2^245213512420 is an apocalyptic number.

245213512420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245213512420 is an abundant number, since it is smaller than the sum of its proper divisors (300025945364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245213512420 is a wasteful number, since it uses less digits than its factorization.

245213512420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721216239 (or 721216237 counting only the distinct ones).

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

Adding to 245213512420 its reverse (24215312542), we get a palindrome (269428824962).

The spelling of 245213512420 in words is "two hundred forty-five billion, two hundred thirteen million, five hundred twelve thousand, four hundred twenty".