245521345421 has 8 divisors (see below), whose sum is σ = 267880989888. Its totient is φ = 223168288000.

The previous prime is 245521345409. The next prime is 245521345423. The reversal of 245521345421 is 124543125542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245521345421 - 2⁶ = 245521345357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245521345423) 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, 1568660 + ... + 1718061.

It is an arithmetic number, because the mean of its divisors is an integer number (33485123736).

Almost surely, 2^245521345421 is an apocalyptic number.

It is an amenable number.

245521345421 is a deficient number, since it is larger than the sum of its proper divisors (22359644467).

245521345421 is a wasteful number, since it uses less digits than its factorization.

245521345421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3293523.

The product of its digits is 192000, while the sum is 38.

The spelling of 245521345421 in words is "two hundred forty-five billion, five hundred twenty-one million, three hundred forty-five thousand, four hundred twenty-one".