1721364513 has 48 divisors (see below), whose sum is σ = 2637230400. Its totient is φ = 996688000.

The previous prime is 1721364509. The next prime is 1721364521. The reversal of 1721364513 is 3154631271.

It is not a de Polignac number, because 1721364513 - 2² = 1721364509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a house number.

It is not an unprimeable number, because it can be changed into a prime (1721364523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1062418 + ... + 1064036.

It is an arithmetic number, because the mean of its divisors is an integer number (54942300).

Almost surely, 2^1721364513 is an apocalyptic number.

It is an amenable number.

1721364513 is a deficient number, since it is larger than the sum of its proper divisors (915865887).

1721364513 is a wasteful number, since it uses less digits than its factorization.

1721364513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774 (or 1763 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 1721364513 is about 41489.3301102826. The cubic root of 1721364513 is about 1198.4620373734.

Adding to 1721364513 its reverse (3154631271), we get a palindrome (4875995784).

The spelling of 1721364513 in words is "one billion, seven hundred twenty-one million, three hundred sixty-four thousand, five hundred thirteen".