20150222251 has 8 divisors (see below), whose sum is σ = 20782707264. Its totient is φ = 19526227200.

The previous prime is 20150222249. The next prime is 20150222297. The reversal of 20150222251 is 15222205102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20150222251 - 2¹ = 20150222249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20150222201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2117670 + ... + 2127163.

It is an arithmetic number, because the mean of its divisors is an integer number (2597838408).

Almost surely, 2^20150222251 is an apocalyptic number.

20150222251 is a deficient number, since it is larger than the sum of its proper divisors (632485013).

20150222251 is a wasteful number, since it uses less digits than its factorization.

20150222251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4244981.

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 20150222251 its reverse (15222205102), we get a palindrome (35372427353).

The spelling of 20150222251 in words is "twenty billion, one hundred fifty million, two hundred twenty-two thousand, two hundred fifty-one".