31444143 has 4 divisors (see below), whose sum is σ = 41925528. Its totient is φ = 20962760.

The previous prime is 31444121. The next prime is 31444157. The reversal of 31444143 is 34144413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34144413 = 3 ⋅11381471.

It is a cyclic number.

It is not a de Polignac number, because 31444143 - 2⁶ = 31444079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31444643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5240688 + ... + 5240693.

It is an arithmetic number, because the mean of its divisors is an integer number (10481382).

Almost surely, 2^31444143 is an apocalyptic number.

31444143 is a deficient number, since it is larger than the sum of its proper divisors (10481385).

31444143 is a wasteful number, since it uses less digits than its factorization.

31444143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10481384.

The product of its digits is 2304, while the sum is 24.

The square root of 31444143 is about 5607.5077351708. The cubic root of 31444143 is about 315.6311959441.

Adding to 31444143 its reverse (34144413), we get a palindrome (65588556).

The spelling of 31444143 in words is "thirty-one million, four hundred forty-four thousand, one hundred forty-three".