42231402 has 32 divisors (see below), whose sum is σ = 94737600. Its totient is φ = 13943664.

The previous prime is 42231389. The next prime is 42231403. The reversal of 42231402 is 20413224.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (42231403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2124 + ... + 9432.

It is an arithmetic number, because the mean of its divisors is an integer number (2960550).

Almost surely, 2^42231402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42231402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47368800).

42231402 is an abundant number, since it is smaller than the sum of its proper divisors (52506198).

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

42231402 is a wasteful number, since it uses less digits than its factorization.

42231402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7427 (or 7421 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42231402 is about 6498.5692271453. The cubic root of 42231402 is about 348.2398762326.

Adding to 42231402 its reverse (20413224), we get a palindrome (62644626).

It can be divided in two parts, 4223 and 1402, that added together give a square (5625 = 75²).

The spelling of 42231402 in words is "forty-two million, two hundred thirty-one thousand, four hundred two".