1523640441 has 4 divisors (see below), whose sum is σ = 2031520592. Its totient is φ = 1015760292.

The previous prime is 1523640413. The next prime is 1523640491. The reversal of 1523640441 is 1440463251.

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 not a de Polignac number, because 1523640441 - 2⁵ = 1523640409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1523640399 and 1523640408.

It is not an unprimeable number, because it can be changed into a prime (1523640491) 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, 253940071 + ... + 253940076.

It is an arithmetic number, because the mean of its divisors is an integer number (507880148).

Almost surely, 2^1523640441 is an apocalyptic number.

It is an amenable number.

1523640441 is a deficient number, since it is larger than the sum of its proper divisors (507880151).

1523640441 is an equidigital number, since it uses as much as digits as its factorization.

1523640441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507880150.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1523640441 is about 39033.8371288296. The cubic root of 1523640441 is about 1150.6966015216.

The spelling of 1523640441 in words is "one billion, five hundred twenty-three million, six hundred forty thousand, four hundred forty-one".