31402443 has 8 divisors (see below), whose sum is σ = 41896768. Its totient is φ = 20921544.

The previous prime is 31402409. The next prime is 31402471. The reversal of 31402443 is 34420413.

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

It is not a de Polignac number, because 31402443 - 2⁶ = 31402379 is a prime.

It is a super-2 number, since 2×31402443² = 1972226852736498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31402243) 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, 5280 + ... + 9522.

It is an arithmetic number, because the mean of its divisors is an integer number (5237096).

Almost surely, 2^31402443 is an apocalyptic number.

31402443 is a deficient number, since it is larger than the sum of its proper divisors (10494325).

31402443 is a wasteful number, since it uses less digits than its factorization.

31402443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6713.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 31402443 is about 5603.7882722316. The cubic root of 31402443 is about 315.4916082802.

Adding to 31402443 its reverse (34420413), we get a palindrome (65822856).

The spelling of 31402443 in words is "thirty-one million, four hundred two thousand, four hundred forty-three".