20150251 has 12 divisors (see below), whose sum is σ = 22272712. Its totient is φ = 18216000.

The previous prime is 20150233. The next prime is 20150257. The reversal of 20150251 is 15205102.

It is a de Polignac number, because none of the positive numbers 2^k-20150251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20150257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28816 + ... + 29506.

Almost surely, 2^20150251 is an apocalyptic number.

20150251 is a deficient number, since it is larger than the sum of its proper divisors (2122461).

20150251 is a wasteful number, since it uses less digits than its factorization.

20150251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 20150251 is about 4488.9030954121. The cubic root of 20150251 is about 272.1198064705.

Adding to 20150251 its reverse (15205102), we get a palindrome (35355353).

The spelling of 20150251 in words is "twenty million, one hundred fifty thousand, two hundred fifty-one".