215142534 has 32 divisors (see below), whose sum is σ = 484652640. Its totient is φ = 70730496.

The previous prime is 215142533. The next prime is 215142541. The reversal of 215142534 is 435241512.

215142534 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 215142498 and 215142507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215142533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23347 + ... + 31230.

It is an arithmetic number, because the mean of its divisors is an integer number (15145395).

Almost surely, 2^215142534 is an apocalyptic number.

215142534 is an abundant number, since it is smaller than the sum of its proper divisors (269510106).

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

215142534 is a wasteful number, since it uses less digits than its factorization.

215142534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54661 (or 54655 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 215142534 is about 14667.7378623972. The cubic root of 215142534 is about 599.2049970825.

The spelling of 215142534 in words is "two hundred fifteen million, one hundred forty-two thousand, five hundred thirty-four".