615240231 has 8 divisors (see below), whose sum is σ = 820900080. Its totient is φ = 409870272.

The previous prime is 615240203. The next prime is 615240281. The reversal of 615240231 is 132042516.

615240231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 615240231 - 2⁷ = 615240103 is a prime.

It is a super-2 number, since 2×615240231² = 757041083681866722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615240281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67470 + ... + 76043.

It is an arithmetic number, because the mean of its divisors is an integer number (102612510).

Almost surely, 2^615240231 is an apocalyptic number.

615240231 is a deficient number, since it is larger than the sum of its proper divisors (205659849).

615240231 is a wasteful number, since it uses less digits than its factorization.

615240231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144945.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 615240231 is about 24804.0365868138. The cubic root of 615240231 is about 850.5142129669.

Adding to 615240231 its reverse (132042516), we get a palindrome (747282747).

The spelling of 615240231 in words is "six hundred fifteen million, two hundred forty thousand, two hundred thirty-one".