131030442 has 24 divisors (see below), whose sum is σ = 284138244. Its totient is φ = 43640064.

The previous prime is 131030437. The next prime is 131030443. The reversal of 131030442 is 244030131.

It can be written as a sum of positive squares in 2 ways, for example, as 118135161 + 12895281 = 10869^2 + 3591^2 .

It is a super-3 number, since 3×131030442³ (a number of 25 digits) contains 333 as substring.

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 (131030443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26778 + ... + 31290.

Almost surely, 2^131030442 is an apocalyptic number.

131030442 is an abundant number, since it is smaller than the sum of its proper divisors (153107802).

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

131030442 is a wasteful number, since it uses less digits than its factorization.

131030442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6134 (or 6131 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 131030442 is about 11446.8529299542. The cubic root of 131030442 is about 507.9146450720.

Adding to 131030442 its reverse (244030131), we get a palindrome (375060573).

The spelling of 131030442 in words is "one hundred thirty-one million, thirty thousand, four hundred forty-two".