215140032 has 168 divisors, whose sum is σ = 661879296. Its totient is φ = 66576384.

The previous prime is 215140007. The next prime is 215140033. The reversal of 215140032 is 230041512.

It is a super-2 number, since 2×215140032² = 92570466737922048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 215139987 and 215140014.

It is not an unprimeable number, because it can be changed into a prime (215140033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1243498 + ... + 1243670.

Almost surely, 2^215140032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215140032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330939648).

215140032 is an abundant number, since it is smaller than the sum of its proper divisors (446739264).

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

215140032 is a wasteful number, since it uses less digits than its factorization.

215140032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 215140032 is about 14667.6525729239. The cubic root of 215140032 is about 599.2026742554.

Adding to 215140032 its reverse (230041512), we get a palindrome (445181544).

The spelling of 215140032 in words is "two hundred fifteen million, one hundred forty thousand, thirty-two".