31845130 has 8 divisors (see below), whose sum is σ = 57321252. Its totient is φ = 12738048.

The previous prime is 31845119. The next prime is 31845139. The reversal of 31845130 is 3154813.

It can be written as a sum of positive squares in 2 ways, for example, as 31843449 + 1681 = 5643^2 + 41^2 .

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

It is a super-2 number, since 2×31845130² = 2028224609433800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31845095 and 31845104.

It is not an unprimeable number, because it can be changed into a prime (31845139) 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, 1592247 + ... + 1592266.

Almost surely, 2^31845130 is an apocalyptic number.

31845130 is a deficient number, since it is larger than the sum of its proper divisors (25476122).

31845130 is a wasteful number, since it uses less digits than its factorization.

31845130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184520.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 31845130 is about 5643.1489436307. The cubic root of 31845130 is about 316.9672135848.

Adding to 31845130 its reverse (3154813), we get a palindrome (34999943).

The spelling of 31845130 in words is "thirty-one million, eight hundred forty-five thousand, one hundred thirty".