38551213 has 2 divisors, whose sum is σ = 38551214. Its totient is φ = 38551212.

The previous prime is 38551199. The next prime is 38551241. The reversal of 38551213 is 31215583.

It is an a-pointer prime, because the next prime (38551241) can be obtained adding 38551213 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32012964 + 6538249 = 5658^2 + 2557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38551213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38551273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19275606 + 19275607.

It is an arithmetic number, because the mean of its divisors is an integer number (19275607).

Almost surely, 2^38551213 is an apocalyptic number.

It is an amenable number.

38551213 is a deficient number, since it is larger than the sum of its proper divisors (1).

38551213 is an equidigital number, since it uses as much as digits as its factorization.

38551213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 28.

The square root of 38551213 is about 6208.9623126574. The cubic root of 38551213 is about 337.8153263322.

Adding to 38551213 its reverse (31215583), we get a palindrome (69766796).

The spelling of 38551213 in words is "thirty-eight million, five hundred fifty-one thousand, two hundred thirteen".