31426172 has 24 divisors (see below), whose sum is σ = 57870960. Its totient is φ = 14912640.

The previous prime is 31426103. The next prime is 31426177. The reversal of 31426172 is 27162413.

It is a super-3 number, since 3×31426172³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31426177) 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, 3479 + ... + 8657.

It is an arithmetic number, because the mean of its divisors is an integer number (2411290).

Almost surely, 2^31426172 is an apocalyptic number.

It is an amenable number.

31426172 is a deficient number, since it is larger than the sum of its proper divisors (26444788).

31426172 is a wasteful number, since it uses less digits than its factorization.

31426172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261 (or 5259 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 31426172 is about 5605.9051008735. The cubic root of 31426172 is about 315.5710544931.

Adding to 31426172 its reverse (27162413), we get a palindrome (58588585).

The spelling of 31426172 in words is "thirty-one million, four hundred twenty-six thousand, one hundred seventy-two".