31433442 has 32 divisors (see below), whose sum is σ = 68719104. Its totient is φ = 9542400.

The previous prime is 31433431. The next prime is 31433447. The reversal of 31433442 is 24433413.

It is a super-2 number, since 2×31433442² = 1976122551934728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31433447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1809 + ... + 8132.

It is an arithmetic number, because the mean of its divisors is an integer number (2147472).

Almost surely, 2^31433442 is an apocalyptic number.

31433442 is an abundant number, since it is smaller than the sum of its proper divisors (37285662).

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

31433442 is a wasteful number, since it uses less digits than its factorization.

31433442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9994.

The product of its digits is 3456, while the sum is 24.

The square root of 31433442 is about 5606.5534867689. The cubic root of 31433442 is about 315.5953869155.

Adding to 31433442 its reverse (24433413), we get a palindrome (55866855).

The spelling of 31433442 in words is "thirty-one million, four hundred thirty-three thousand, four hundred forty-two".