421453101552541 has 4 divisors (see below), whose sum is σ = 421453217333500. Its totient is φ = 421452985771584.

The previous prime is 421453101552517. The next prime is 421453101552551. The reversal of 421453101552541 is 145255101354124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 177141352826916 + 244311748725625 = 13309446^2 + 15630475^2 .

It is a cyclic number.

It is not a de Polignac number, because 421453101552541 - 2²³ = 421453093163933 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 (421453101552551) 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, 52246956 + ... + 59771653.

It is an arithmetic number, because the mean of its divisors is an integer number (105363304333375).

Almost surely, 2^{421453101552541} is an apocalyptic number.

It is an amenable number.

421453101552541 is a deficient number, since it is larger than the sum of its proper divisors (115780959).

421453101552541 is a wasteful number, since it uses less digits than its factorization.

421453101552541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115780958.

The product of its (nonzero) digits is 480000, while the sum is 43.

The spelling of 421453101552541 in words is "four hundred twenty-one trillion, four hundred fifty-three billion, one hundred one million, five hundred fifty-two thousand, five hundred forty-one".