131133402 has 96 divisors (see below), whose sum is σ = 315606720. Its totient is φ = 39191040.

The previous prime is 131133391. The next prime is 131133403. The reversal of 131133402 is 204331131.

131133402 is a `hidden beast` number, since 131 + 133 + 402 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (131133403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 544002 + ... + 544242.

It is an arithmetic number, because the mean of its divisors is an integer number (3287570).

Almost surely, 2^131133402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131133402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157803360).

131133402 is an abundant number, since it is smaller than the sum of its proper divisors (184473318).

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

131133402 is a wasteful number, since it uses less digits than its factorization.

131133402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 131133402 is about 11451.3493528055. The cubic root of 131133402 is about 508.0476452099.

Adding to 131133402 its reverse (204331131), we get a palindrome (335464533).

The spelling of 131133402 in words is "one hundred thirty-one million, one hundred thirty-three thousand, four hundred two".