31341072 has 80 divisors (see below), whose sum is σ = 95069312. Its totient is φ = 8709120.

The previous prime is 31341071. The next prime is 31341091. The reversal of 31341072 is 27014313.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (31341071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11172 + ... + 13692.

Almost surely, 2^31341072 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 31341072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47534656).

31341072 is an abundant number, since it is smaller than the sum of its proper divisors (63728240).

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

31341072 is a wasteful number, since it uses less digits than its factorization.

31341072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576 (or 2570 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 31341072 is about 5598.3097449141. The cubic root of 31341072 is about 315.2859484581.

Adding to 31341072 its reverse (27014313), we get a palindrome (58355385).

The spelling of 31341072 in words is "thirty-one million, three hundred forty-one thousand, seventy-two".