20215000151 has 4 divisors (see below), whose sum is σ = 20215511400. Its totient is φ = 20214488904.

The previous prime is 20215000147. The next prime is 20215000171. The reversal of 20215000151 is 15100051202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20215000151 - 2² = 20215000147 is a prime.

It is a super-2 number, since 2×20215000151² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20215000171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190841 + ... + 277218.

It is an arithmetic number, because the mean of its divisors is an integer number (5053877850).

Almost surely, 2^20215000151 is an apocalyptic number.

20215000151 is a deficient number, since it is larger than the sum of its proper divisors (511249).

20215000151 is an equidigital number, since it uses as much as digits as its factorization.

20215000151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511248.

The product of its (nonzero) digits is 100, while the sum is 17.

Adding to 20215000151 its reverse (15100051202), we get a palindrome (35315051353).

The spelling of 20215000151 in words is "twenty billion, two hundred fifteen million, one hundred fifty-one", and thus it is an aban number.