215140794 has 32 divisors (see below), whose sum is σ = 473112576. Its totient is φ = 64678320.

The previous prime is 215140789. The next prime is 215140799. The reversal of 215140794 is 497041512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (215140789) and next prime (215140799).

It is a super-2 number, since 2×215140794² = 92571122485900872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (215140799) 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, 4452 + ... + 21215.

It is an arithmetic number, because the mean of its divisors is an integer number (14784768).

Almost surely, 2^215140794 is an apocalyptic number.

215140794 is an abundant number, since it is smaller than the sum of its proper divisors (257971782).

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

215140794 is a wasteful number, since it uses less digits than its factorization.

215140794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25810.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 215140794 is about 14667.6785484275. The cubic root of 215140794 is about 599.2033816891.

The spelling of 215140794 in words is "two hundred fifteen million, one hundred forty thousand, seven hundred ninety-four".