38722513 has 4 divisors (see below), whose sum is σ = 40760560. Its totient is φ = 36684468.

The previous prime is 38722507. The next prime is 38722529. The reversal of 38722513 is 31522783.

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: 31522783 = 2749 ⋅11467.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38722513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38722543) 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, 1018995 + ... + 1019032.

It is an arithmetic number, because the mean of its divisors is an integer number (10190140).

Almost surely, 2^38722513 is an apocalyptic number.

It is an amenable number.

38722513 is a deficient number, since it is larger than the sum of its proper divisors (2038047).

38722513 is a wasteful number, since it uses less digits than its factorization.

38722513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038046.

The product of its digits is 10080, while the sum is 31.

The square root of 38722513 is about 6222.7415983632. The cubic root of 38722513 is about 338.3149410975.

The spelling of 38722513 in words is "thirty-eight million, seven hundred twenty-two thousand, five hundred thirteen".