215142421254 has 16 divisors (see below), whose sum is σ = 430312117248. Its totient is φ = 71709594632.

The previous prime is 215142421253. The next prime is 215142421301. The reversal of 215142421254 is 452124241512.

215142421254 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215142421254² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215142421253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033182 + ... + 1223825.

It is an arithmetic number, because the mean of its divisors is an integer number (26894507328).

Almost surely, 2^215142421254 is an apocalyptic number.

215142421254 is an abundant number, since it is smaller than the sum of its proper divisors (215169695994).

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

215142421254 is a wasteful number, since it uses less digits than its factorization.

215142421254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272899.

The product of its digits is 25600, while the sum is 33.

Adding to 215142421254 its reverse (452124241512), we get a palindrome (667266662766).

The spelling of 215142421254 in words is "two hundred fifteen billion, one hundred forty-two million, four hundred twenty-one thousand, two hundred fifty-four".