38906551 has 2 divisors, whose sum is σ = 38906552. Its totient is φ = 38906550.

The previous prime is 38906521. The next prime is 38906561. The reversal of 38906551 is 15560983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38906551 - 2⁷ = 38906423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38906551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38906521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19453275 + 19453276.

It is an arithmetic number, because the mean of its divisors is an integer number (19453276).

Almost surely, 2^38906551 is an apocalyptic number.

38906551 is the 2790-th centered decagonal number.

38906551 is a deficient number, since it is larger than the sum of its proper divisors (1).

38906551 is an equidigital number, since it uses as much as digits as its factorization.

38906551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 38906551 is about 6237.5116031956. The cubic root of 38906551 is about 338.8500684289.

The spelling of 38906551 in words is "thirty-eight million, nine hundred six thousand, five hundred fifty-one".