38021513 has 4 divisors (see below), whose sum is σ = 38057088. Its totient is φ = 37985940.

The previous prime is 38021497. The next prime is 38021519. The reversal of 38021513 is 31512083.

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 a cyclic number.

It is not a de Polignac number, because 38021513 - 2⁴ = 38021497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38021519) 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, 16133 + ... + 18338.

It is an arithmetic number, because the mean of its divisors is an integer number (9514272).

Almost surely, 2^38021513 is an apocalyptic number.

It is an amenable number.

38021513 is a deficient number, since it is larger than the sum of its proper divisors (35575).

38021513 is a wasteful number, since it uses less digits than its factorization.

38021513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35574.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 38021513 is about 6166.1586907896. The cubic root of 38021513 is about 336.2609727260.

Adding to 38021513 its reverse (31512083), we get a palindrome (69533596).

The spelling of 38021513 in words is "thirty-eight million, twenty-one thousand, five hundred thirteen".