1953213563 has 4 divisors (see below), whose sum is σ = 2232244080. Its totient is φ = 1674183048.

The previous prime is 1953213557. The next prime is 1953213571. The reversal of 1953213563 is 3653123591.

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 1953213563 - 2⁶ = 1953213499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1953213583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139515248 + ... + 139515261.

It is an arithmetic number, because the mean of its divisors is an integer number (558061020).

Almost surely, 2^1953213563 is an apocalyptic number.

1953213563 is a deficient number, since it is larger than the sum of its proper divisors (279030517).

1953213563 is an equidigital number, since it uses as much as digits as its factorization.

1953213563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279030516.

The product of its digits is 72900, while the sum is 38.

The square root of 1953213563 is about 44195.1757887668. The cubic root of 1953213563 is about 1250.0188931544.

The spelling of 1953213563 in words is "one billion, nine hundred fifty-three million, two hundred thirteen thousand, five hundred sixty-three".