31461036 has 48 divisors (see below), whose sum is σ = 79094400. Its totient is φ = 9700992.

The previous prime is 31461013. The next prime is 31461037. The reversal of 31461036 is 63016413.

It is a junction number, because it is equal to n+sod(n) for n = 31460997 and 31461015.

It is not an unprimeable number, because it can be changed into a prime (31461037) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8200 + ... + 11408.

It is an arithmetic number, because the mean of its divisors is an integer number (1647800).

Almost surely, 2^31461036 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 31461036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39547200).

31461036 is an abundant number, since it is smaller than the sum of its proper divisors (47633364).

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

31461036 is a wasteful number, since it uses less digits than its factorization.

31461036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278 (or 3276 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 31461036 is about 5609.0138170627. The cubic root of 31461036 is about 315.6877088877.

Adding to 31461036 its reverse (63016413), we get a palindrome (94477449).

The spelling of 31461036 in words is "thirty-one million, four hundred sixty-one thousand, thirty-six".