221430620476340 has 96 divisors (see below), whose sum is σ = 529339734878976. Its totient is φ = 77018360714240.

The previous prime is 221430620476313. The next prime is 221430620476349. The reversal of 221430620476340 is 43674026034122.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 221430620476291 and 221430620476300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221430620476349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474865544 + ... + 475331616.

It is an arithmetic number, because the mean of its divisors is an integer number (5513955571656).

Almost surely, 2^{221430620476340} is an apocalyptic number.

221430620476340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221430620476340 is an abundant number, since it is smaller than the sum of its proper divisors (307909114402636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221430620476340 is a wasteful number, since it uses less digits than its factorization.

221430620476340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560009 (or 560007 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 44.

The spelling of 221430620476340 in words is "two hundred twenty-one trillion, four hundred thirty billion, six hundred twenty million, four hundred seventy-six thousand, three hundred forty".