231545530 has 16 divisors (see below), whose sum is σ = 420910344. Its totient is φ = 91700800.

The previous prime is 231545527. The next prime is 231545557. The reversal of 231545530 is 35545132.

It can be written as a sum of positive squares in 4 ways, for example, as 231252849 + 292681 = 15207^2 + 541^2 .

It is a super-2 number, since 2×231545530² = 107226664925961800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113617 + ... + 115636.

Almost surely, 2^231545530 is an apocalyptic number.

231545530 is a deficient number, since it is larger than the sum of its proper divisors (189364814).

231545530 is a wasteful number, since it uses less digits than its factorization.

231545530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229361.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 231545530 is about 15216.6201897793. The cubic root of 231545530 is about 614.0618741736.

The spelling of 231545530 in words is "two hundred thirty-one million, five hundred forty-five thousand, five hundred thirty".