421235275547 has 2 divisors, whose sum is σ = 421235275548. Its totient is φ = 421235275546.

The previous prime is 421235275529. The next prime is 421235275553. The reversal of 421235275547 is 745572532124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421235275547 - 2⁸ = 421235275291 is a prime.

It is a super-2 number, since 2×421235275547² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421235275147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210617637773 + 210617637774.

It is an arithmetic number, because the mean of its divisors is an integer number (210617637774).

Almost surely, 2^421235275547 is an apocalyptic number.

421235275547 is a deficient number, since it is larger than the sum of its proper divisors (1).

421235275547 is an equidigital number, since it uses as much as digits as its factorization.

421235275547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352000, while the sum is 47.

The spelling of 421235275547 in words is "four hundred twenty-one billion, two hundred thirty-five million, two hundred seventy-five thousand, five hundred forty-seven".