131630421 has 8 divisors (see below), whose sum is σ = 189007840. Its totient is φ = 81003312.

The previous prime is 131630399. The next prime is 131630431. The reversal of 131630421 is 124036131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131630421 - 2¹⁸ = 131368277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131630431) 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, 1687531 + ... + 1687608.

It is an arithmetic number, because the mean of its divisors is an integer number (23625980).

Almost surely, 2^131630421 is an apocalyptic number.

It is an amenable number.

131630421 is a deficient number, since it is larger than the sum of its proper divisors (57377419).

131630421 is a wasteful number, since it uses less digits than its factorization.

131630421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375155.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 131630421 is about 11473.0301577221. The cubic root of 131630421 is about 508.6886997398.

Adding to 131630421 its reverse (124036131), we get a palindrome (255666552).

The spelling of 131630421 in words is "one hundred thirty-one million, six hundred thirty thousand, four hundred twenty-one".