131222004 has 24 divisors (see below), whose sum is σ = 309876000. Its totient is φ = 43213344.

The previous prime is 131221991. The next prime is 131222023. The reversal of 131222004 is 400222131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64879 + ... + 66870.

It is an arithmetic number, because the mean of its divisors is an integer number (12911500).

Almost surely, 2^131222004 is an apocalyptic number.

It is an amenable number.

131222004 is an abundant number, since it is smaller than the sum of its proper divisors (178653996).

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

131222004 is a wasteful number, since it uses less digits than its factorization.

131222004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131839 (or 131837 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 131222004 is about 11455.2173266159. The cubic root of 131222004 is about 508.1620424635.

Adding to 131222004 its reverse (400222131), we get a palindrome (531444135).

The spelling of 131222004 in words is "one hundred thirty-one million, two hundred twenty-two thousand, four".