1571720053 has 4 divisors (see below), whose sum is σ = 1583718048. Its totient is φ = 1559722060.

The previous prime is 1571720027. The next prime is 1571720063. The reversal of 1571720053 is 3500271751.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3500271751 = 19 ⋅184224829.

It is a cyclic number.

It is not a de Polignac number, because 1571720053 - 2²⁵ = 1538165621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1571719997 and 1571720024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1571720063) 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, 5998801 + ... + 5999062.

It is an arithmetic number, because the mean of its divisors is an integer number (395929512).

Almost surely, 2^1571720053 is an apocalyptic number.

It is an amenable number.

1571720053 is a deficient number, since it is larger than the sum of its proper divisors (11997995).

1571720053 is a wasteful number, since it uses less digits than its factorization.

1571720053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11997994.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 1571720053 is about 39644.9246814772. The cubic root of 1571720053 is about 1162.6751707050.

The spelling of 1571720053 in words is "one billion, five hundred seventy-one million, seven hundred twenty thousand, fifty-three".