31453136 has 80 divisors (see below), whose sum is σ = 73120320. Its totient is φ = 12917760.

The previous prime is 31453133. The next prime is 31453141. The reversal of 31453136 is 63135413.

It is a Harshad number since it is a multiple of its sum of digits (26).

31453136 is a Rhonda number in base 10.

Its product of digits (3240) is a multiple of the sum of its prime factors (324).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31453133) 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, 134876 + ... + 135108.

It is an arithmetic number, because the mean of its divisors is an integer number (914004).

Almost surely, 2^31453136 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 31453136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36560160).

31453136 is an abundant number, since it is smaller than the sum of its proper divisors (41667184).

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

31453136 is a wasteful number, since it uses less digits than its factorization.

31453136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 318 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 31453136 is about 5608.3095492314. The cubic root of 31453136 is about 315.6612831667.

Adding to 31453136 its reverse (63135413), we get a palindrome (94588549).

The spelling of 31453136 in words is "thirty-one million, four hundred fifty-three thousand, one hundred thirty-six".