84420231 has 8 divisors (see below), whose sum is σ = 128640384. Its totient is φ = 48240120.

The previous prime is 84420229. The next prime is 84420233. The reversal of 84420231 is 13202448.

It is an interprime number because it is at equal distance from previous prime (84420229) and next prime (84420233).

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

It is not a de Polignac number, because 84420231 - 2¹ = 84420229 is a prime.

It is a super-2 number, since 2×84420231² = 14253550804186722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84420233) 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, 2009985 + ... + 2010026.

It is an arithmetic number, because the mean of its divisors is an integer number (16080048).

Almost surely, 2^84420231 is an apocalyptic number.

84420231 is a deficient number, since it is larger than the sum of its proper divisors (44220153).

84420231 is a wasteful number, since it uses less digits than its factorization.

84420231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020021.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 84420231 is about 9188.0482693551. The cubic root of 84420231 is about 438.6810208033.

Adding to 84420231 its reverse (13202448), we get a palindrome (97622679).

The spelling of 84420231 in words is "eighty-four million, four hundred twenty thousand, two hundred thirty-one".