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427221317 = 839509203
BaseRepresentation
bin11001011101101…
…110000101000101
31002202220002110202
4121131232011011
51333332040232
6110220500245
713405215125
oct3135560505
91082802422
10427221317
111aa178776
12bb0aa685
136a6828a3
1440a4cc85
152778e162
hex1976e145

427221317 has 4 divisors (see below), whose sum is σ = 427731360. Its totient is φ = 426711276.

The previous prime is 427221313. The next prime is 427221341. The reversal of 427221317 is 713122724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 427221317 - 22 = 427221313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427221317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427221313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253763 + ... + 255440.

It is an arithmetic number, because the mean of its divisors is an integer number (106932840).

Almost surely, 2427221317 is an apocalyptic number.

It is an amenable number.

427221317 is a deficient number, since it is larger than the sum of its proper divisors (510043).

427221317 is an equidigital number, since it uses as much as digits as its factorization.

427221317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510042.

The product of its digits is 4704, while the sum is 29.

The square root of 427221317 is about 20669.3327662022. The cubic root of 427221317 is about 753.1548980676.

The spelling of 427221317 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, three hundred seventeen".

Divisors: 1 839 509203 427221317