131220430 has 32 divisors (see below), whose sum is σ = 258160608. Its totient is φ = 47625600.

The previous prime is 131220409. The next prime is 131220449. The reversal of 131220430 is 34022131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89584 + ... + 91036.

It is an arithmetic number, because the mean of its divisors is an integer number (8067519).

Almost surely, 2^131220430 is an apocalyptic number.

131220430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131220430 is a deficient number, since it is larger than the sum of its proper divisors (126940178).

131220430 is a wasteful number, since it uses less digits than its factorization.

131220430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 131220430 is about 11455.1486240904. The cubic root of 131220430 is about 508.1600106644.

Adding to 131220430 its reverse (34022131), we get a palindrome (165242561).

The spelling of 131220430 in words is "one hundred thirty-one million, two hundred twenty thousand, four hundred thirty".