1513830421 has 4 divisors (see below), whose sum is σ = 1566031500. Its totient is φ = 1461629344.

The previous prime is 1513830401. The next prime is 1513830481. The reversal of 1513830421 is 1240383151.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 917787025 + 596043396 = 30295^2 + 24414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1513830421 - 2⁷ = 1513830293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1513830421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1513830401) 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, 26100496 + ... + 26100553.

It is an arithmetic number, because the mean of its divisors is an integer number (391507875).

Almost surely, 2^1513830421 is an apocalyptic number.

It is an amenable number.

1513830421 is a deficient number, since it is larger than the sum of its proper divisors (52201079).

1513830421 is an equidigital number, since it uses as much as digits as its factorization.

1513830421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52201078.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1513830421 is about 38907.9737457504. The cubic root of 1513830421 is about 1148.2216802194.

The spelling of 1513830421 in words is "one billion, five hundred thirteen million, eight hundred thirty thousand, four hundred twenty-one".