245316221000 has 32 divisors (see below), whose sum is σ = 574039959480. Its totient is φ = 98126488000.

The previous prime is 245316220987. The next prime is 245316221047. The reversal of 245316221000 is 122613542.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 146708916676 + 98607304324 = 383026^2 + 314018^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122657111 + ... + 122659110.

Almost surely, 2^245316221000 is an apocalyptic number.

245316221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245316221000 is an abundant number, since it is smaller than the sum of its proper divisors (328723738480).

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

245316221000 is a wasteful number, since it uses less digits than its factorization.

245316221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245316242 (or 245316228 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 245316221000 its reverse (122613542), we get a palindrome (245438834542).

The spelling of 245316221000 in words is "two hundred forty-five billion, three hundred sixteen million, two hundred twenty-one thousand".