215001214520154 has 16 divisors (see below), whose sum is σ = 430028105626848. Its totient is φ = 71662792075632.

The previous prime is 215001214520153. The next prime is 215001214520171. The reversal of 215001214520154 is 451025412100512.

It is not an unprimeable number, because it can be changed into a prime (215001214520153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1069748917 + ... + 1069949880.

It is an arithmetic number, because the mean of its divisors is an integer number (26876756601678).

Almost surely, 2^{215001214520154} is an apocalyptic number.

215001214520154 is an abundant number, since it is smaller than the sum of its proper divisors (215026891106694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215001214520154 is a wasteful number, since it uses less digits than its factorization.

215001214520154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139715549.

The product of its (nonzero) digits is 16000, while the sum is 33.

Adding to 215001214520154 its reverse (451025412100512), we get a palindrome (666026626620666).

The spelling of 215001214520154 in words is "two hundred fifteen trillion, one billion, two hundred fourteen million, five hundred twenty thousand, one hundred fifty-four".