1604057231 has 4 divisors (see below), whose sum is σ = 1833208272. Its totient is φ = 1374906192.

The previous prime is 1604057207. The next prime is 1604057267. The reversal of 1604057231 is 1327504061.

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 1604057231 - 2³⁰ = 530315407 is a prime.

It is a super-2 number, since 2×1604057231² = 5145999200646774722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1604057194 and 1604057203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604057201) 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, 114575510 + ... + 114575523.

It is an arithmetic number, because the mean of its divisors is an integer number (458302068).

Almost surely, 2^1604057231 is an apocalyptic number.

1604057231 is a deficient number, since it is larger than the sum of its proper divisors (229151041).

1604057231 is an equidigital number, since it uses as much as digits as its factorization.

1604057231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229151040.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1604057231 is about 40050.6832775672. The cubic root of 1604057231 is about 1170.5948787757.

The spelling of 1604057231 in words is "one billion, six hundred four million, fifty-seven thousand, two hundred thirty-one".