8214477381 has 80 divisors (see below), whose sum is σ = 13630655808. Its totient is φ = 4888512000.

The previous prime is 8214477361. The next prime is 8214477409. The reversal of 8214477381 is 1837744128.

It is not a de Polignac number, because 8214477381 - 2⁶ = 8214477317 is a prime.

It is a super-2 number, since 2×8214477381² (a number of 21 digits) contains 22 as substring.

Its product of digits (301056) is a multiple of the sum of its prime factors (784).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8214477361) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 20484781 + ... + 20485181.

Almost surely, 2^8214477381 is an apocalyptic number.

8214477381 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8214477381 is a deficient number, since it is larger than the sum of its proper divisors (5416178427).

8214477381 is a wasteful number, since it uses less digits than its factorization.

8214477381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 775 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 8214477381 is about 90633.7540930530. The cubic root of 8214477381 is about 2017.7157282342.

It can be divided in two parts, 821447 and 7381, that added together give a palindrome (828828).

The spelling of 8214477381 in words is "eight billion, two hundred fourteen million, four hundred seventy-seven thousand, three hundred eighty-one".