421453251335551 has 2 divisors, whose sum is σ = 421453251335552. Its totient is φ = 421453251335550.

The previous prime is 421453251335533. The next prime is 421453251335651. The reversal of 421453251335551 is 155533152354124.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421453251335551 is a prime.

It is a super-2 number, since 2×421453251335551² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421453251335495 and 421453251335504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421453251335651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210726625667775 + 210726625667776.

It is an arithmetic number, because the mean of its divisors is an integer number (210726625667776).

Almost surely, 2^{421453251335551} is an apocalyptic number.

421453251335551 is a deficient number, since it is larger than the sum of its proper divisors (1).

421453251335551 is an equidigital number, since it uses as much as digits as its factorization.

421453251335551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400000, while the sum is 49.

The spelling of 421453251335551 in words is "four hundred twenty-one trillion, four hundred fifty-three billion, two hundred fifty-one million, three hundred thirty-five thousand, five hundred fifty-one".