13231577 has 4 divisors (see below), whose sum is σ = 13310976. Its totient is φ = 13152180.

The previous prime is 13231553. The next prime is 13231583. The reversal of 13231577 is 77513231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13231577 - 2¹⁴ = 13215193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13236577) 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, 39449 + ... + 39782.

It is an arithmetic number, because the mean of its divisors is an integer number (3327744).

Almost surely, 2^13231577 is an apocalyptic number.

It is an amenable number.

13231577 is a deficient number, since it is larger than the sum of its proper divisors (79399).

13231577 is an equidigital number, since it uses as much as digits as its factorization.

13231577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79398.

The product of its digits is 4410, while the sum is 29.

The square root of 13231577 is about 3637.5234707147. The cubic root of 13231577 is about 236.5214518368.

The spelling of 13231577 in words is "thirteen million, two hundred thirty-one thousand, five hundred seventy-seven".