31123464 has 32 divisors (see below), whose sum is σ = 82386720. Its totient is φ = 9764096.

The previous prime is 31123457. The next prime is 31123483. The reversal of 31123464 is 46432113.

It is a super-2 number, since 2×31123464² = 1937340022718592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37734 + ... + 38549.

It is an arithmetic number, because the mean of its divisors is an integer number (2574585).

Almost surely, 2^31123464 is an apocalyptic number.

31123464 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31123464 is an abundant number, since it is smaller than the sum of its proper divisors (51263256).

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

31123464 is a wasteful number, since it uses less digits than its factorization.

31123464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76309 (or 76305 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 31123464 is about 5578.8407397953. The cubic root of 31123464 is about 314.5545530483.

Adding to 31123464 its reverse (46432113), we get a palindrome (77555577).

The spelling of 31123464 in words is "thirty-one million, one hundred twenty-three thousand, four hundred sixty-four".