31424312 has 8 divisors (see below), whose sum is σ = 58920600. Its totient is φ = 15712152.

The previous prime is 31424303. The next prime is 31424321. The reversal of 31424312 is 21342413.

It is an interprime number because it is at equal distance from previous prime (31424303) and next prime (31424321).

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×31424312³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964012 + ... + 1964027.

It is an arithmetic number, because the mean of its divisors is an integer number (7365075).

Almost surely, 2^31424312 is an apocalyptic number.

It is an amenable number.

31424312 is a deficient number, since it is larger than the sum of its proper divisors (27496288).

31424312 is a wasteful number, since it uses less digits than its factorization.

31424312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928045 (or 3928041 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 31424312 is about 5605.7392019251. The cubic root of 31424312 is about 315.5648285387.

Adding to 31424312 its reverse (21342413), we get a palindrome (52766725).

The spelling of 31424312 in words is "thirty-one million, four hundred twenty-four thousand, three hundred twelve".