31144342 has 4 divisors (see below), whose sum is σ = 46716516. Its totient is φ = 15572170.

The previous prime is 31144313. The next prime is 31144349. The reversal of 31144342 is 24344113.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×31144342² = 1939940077225928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7786084 + ... + 7786087.

It is an arithmetic number, because the mean of its divisors is an integer number (11679129).

Almost surely, 2^31144342 is an apocalyptic number.

31144342 is a deficient number, since it is larger than the sum of its proper divisors (15572174).

31144342 is a wasteful number, since it uses less digits than its factorization.

31144342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15572173.

The product of its digits is 1152, while the sum is 22.

The square root of 31144342 is about 5580.7116033710. The cubic root of 31144342 is about 314.6248730063.

Adding to 31144342 its reverse (24344113), we get a palindrome (55488455).

The spelling of 31144342 in words is "thirty-one million, one hundred forty-four thousand, three hundred forty-two".