31050140 has 48 divisors (see below), whose sum is σ = 71820000. Its totient is φ = 11182080.

The previous prime is 31050139. The next prime is 31050157. The reversal of 31050140 is 4105013.

It is a super-2 number, since 2×31050140² = 1928222388039200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24236 + ... + 25484.

It is an arithmetic number, because the mean of its divisors is an integer number (1496250).

Almost surely, 2^31050140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31050140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35910000).

31050140 is an abundant number, since it is smaller than the sum of its proper divisors (40769860).

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

31050140 is a wasteful number, since it uses less digits than its factorization.

31050140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382 (or 1380 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 31050140 is about 5572.2652485322. The cubic root of 31050140 is about 314.3073383390.

Adding to 31050140 its reverse (4105013), we get a palindrome (35155153).

The spelling of 31050140 in words is "thirty-one million, fifty thousand, one hundred forty".