421353755571 has 16 divisors (see below), whose sum is σ = 642129840128. Its totient is φ = 240748459200.

The previous prime is 421353755551. The next prime is 421353755591. The reversal of 421353755571 is 175557353124.

It is an interprime number because it is at equal distance from previous prime (421353755551) and next prime (421353755591).

It is not a de Polignac number, because 421353755571 - 2²² = 421349561267 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 421353755571.

It is not an unprimeable number, because it can be changed into a prime (421353755551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 839410 + ... + 1243911.

It is an arithmetic number, because the mean of its divisors is an integer number (40133115008).

Almost surely, 2^421353755571 is an apocalyptic number.

421353755571 is a deficient number, since it is larger than the sum of its proper divisors (220776084557).

421353755571 is a wasteful number, since it uses less digits than its factorization.

421353755571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092962.

The product of its digits is 2205000, while the sum is 48.

The spelling of 421353755571 in words is "four hundred twenty-one billion, three hundred fifty-three million, seven hundred fifty-five thousand, five hundred seventy-one".