28150513 has 2 divisors, whose sum is σ = 28150514. Its totient is φ = 28150512.

The previous prime is 28150483. The next prime is 28150517. The reversal of 28150513 is 31505182.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27583504 + 567009 = 5252^2 + 753^2 .

It is a cyclic number.

It is not a de Polignac number, because 28150513 - 2⁵ = 28150481 is a prime.

It is not a weakly prime, because it can be changed into another prime (28150517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14075256 + 14075257.

It is an arithmetic number, because the mean of its divisors is an integer number (14075257).

Almost surely, 2^28150513 is an apocalyptic number.

It is an amenable number.

28150513 is a deficient number, since it is larger than the sum of its proper divisors (1).

28150513 is an equidigital number, since it uses as much as digits as its factorization.

28150513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 28150513 is about 5305.7057023548. The cubic root of 28150513 is about 304.2020276731.

Adding to 28150513 its reverse (31505182), we get a palindrome (59655695).

The spelling of 28150513 in words is "twenty-eight million, one hundred fifty thousand, five hundred thirteen".