131972019 has 4 divisors (see below), whose sum is σ = 175962696. Its totient is φ = 87981344.

The previous prime is 131971937. The next prime is 131972033. The reversal of 131972019 is 910279131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131972019 - 2¹⁶ = 131906483 is a prime.

It is a super-2 number, since 2×131972019² = 34833227597872722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131972039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21995334 + ... + 21995339.

It is an arithmetic number, because the mean of its divisors is an integer number (43990674).

Almost surely, 2^131972019 is an apocalyptic number.

131972019 is a deficient number, since it is larger than the sum of its proper divisors (43990677).

131972019 is an equidigital number, since it uses as much as digits as its factorization.

131972019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43990676.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 131972019 is about 11487.9075118143. The cubic root of 131972019 is about 509.1283573344.

The spelling of 131972019 in words is "one hundred thirty-one million, nine hundred seventy-two thousand, nineteen".