131102004 has 24 divisors (see below), whose sum is σ = 333714528. Its totient is φ = 39727840.

The previous prime is 131102003. The next prime is 131102017. The reversal of 131102004 is 400201131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131102003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496467 + ... + 496730.

It is an arithmetic number, because the mean of its divisors is an integer number (13904772).

Almost surely, 2^131102004 is an apocalyptic number.

It is an amenable number.

131102004 is an abundant number, since it is smaller than the sum of its proper divisors (202612524).

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

131102004 is a wasteful number, since it uses less digits than its factorization.

131102004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993215 (or 993213 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 131102004 is about 11449.9783405909. The cubic root of 131102004 is about 508.0070937485.

Adding to 131102004 its reverse (400201131), we get a palindrome (531303135).

The spelling of 131102004 in words is "one hundred thirty-one million, one hundred two thousand, four".