231378530 has 32 divisors (see below), whose sum is σ = 438177600. Its totient is φ = 87838912.

The previous prime is 231378493. The next prime is 231378533. The reversal of 231378530 is 35873132.

231378530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231378533) 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, 10349 + ... + 23871.

It is an arithmetic number, because the mean of its divisors is an integer number (13693050).

Almost surely, 2^231378530 is an apocalyptic number.

231378530 is a deficient number, since it is larger than the sum of its proper divisors (206799070).

231378530 is a wasteful number, since it uses less digits than its factorization.

231378530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13618.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 231378530 is about 15211.1317790623. The cubic root of 231378530 is about 613.9142099152.

The spelling of 231378530 in words is "two hundred thirty-one million, three hundred seventy-eight thousand, five hundred thirty".