31045950 has 192 divisors, whose sum is σ = 96868800. Its totient is φ = 7257600.

The previous prime is 31045933. The next prime is 31046003. The reversal of 31045950 is 5954013.

It is a super-2 number, since 2×31045950² = 1927702022805000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 508920 + ... + 508980.

It is an arithmetic number, because the mean of its divisors is an integer number (504525).

Almost surely, 2^31045950 is an apocalyptic number.

31045950 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31045950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48434400).

31045950 is an abundant number, since it is smaller than the sum of its proper divisors (65822850).

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

31045950 is a wasteful number, since it uses less digits than its factorization.

31045950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 31045950 is about 5571.8892666671. The cubic root of 31045950 is about 314.2931998414.

Adding to 31045950 its reverse (5954013), we get a palindrome (36999963).

The spelling of 31045950 in words is "thirty-one million, forty-five thousand, nine hundred fifty".