421247256353173 has 8 divisors (see below), whose sum is σ = 438009862037760. Its totient is φ = 404683024700640.

The previous prime is 421247256353171. The next prime is 421247256353221. The reversal of 421247256353173 is 371353652742124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421247256353173 - 2¹ = 421247256353171 is a prime.

It is a super-2 number, since 2×421247256353173² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421247256353171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49593503683 + ... + 49593512176.

It is an arithmetic number, because the mean of its divisors is an integer number (54751232754720).

Almost surely, 2^{421247256353173} is an apocalyptic number.

It is an amenable number.

421247256353173 is a deficient number, since it is larger than the sum of its proper divisors (16762605684587).

421247256353173 is a wasteful number, since it uses less digits than its factorization.

421247256353173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99187016027.

The product of its digits is 25401600, while the sum is 55.

The spelling of 421247256353173 in words is "four hundred twenty-one trillion, two hundred forty-seven billion, two hundred fifty-six million, three hundred fifty-three thousand, one hundred seventy-three".