215020275 has 12 divisors (see below), whose sum is σ = 355500312. Its totient is φ = 114677440.

The previous prime is 215020241. The next prime is 215020279. The reversal of 215020275 is 572020512.

It is a de Polignac number, because none of the positive numbers 2^k-215020275 is a prime.

It is a super-2 number, since 2×215020275² = 92467437322151250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (215020279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1433394 + ... + 1433543.

It is an arithmetic number, because the mean of its divisors is an integer number (29625026).

Almost surely, 2^215020275 is an apocalyptic number.

215020275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

215020275 is a deficient number, since it is larger than the sum of its proper divisors (140480037).

215020275 is a wasteful number, since it uses less digits than its factorization.

215020275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866950 (or 2866945 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 215020275 is about 14663.5696540781. The cubic root of 215020275 is about 599.0914722120.

Adding to 215020275 its reverse (572020512), we get a palindrome (787040787).

The spelling of 215020275 in words is "two hundred fifteen million, twenty thousand, two hundred seventy-five".