421154755547 has 2 divisors, whose sum is σ = 421154755548. Its totient is φ = 421154755546.

The previous prime is 421154755501. The next prime is 421154755583. The reversal of 421154755547 is 745557451124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421154755547 - 2²² = 421150561243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421154755495 and 421154755504.

It is not a weakly prime, because it can be changed into another prime (421154755597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210577377773 + 210577377774.

It is an arithmetic number, because the mean of its divisors is an integer number (210577377774).

Almost surely, 2^421154755547 is an apocalyptic number.

421154755547 is a deficient number, since it is larger than the sum of its proper divisors (1).

421154755547 is an equidigital number, since it uses as much as digits as its factorization.

421154755547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3920000, while the sum is 50.

The spelling of 421154755547 in words is "four hundred twenty-one billion, one hundred fifty-four million, seven hundred fifty-five thousand, five hundred forty-seven".