231540002 has 8 divisors (see below), whose sum is σ = 359286300. Its totient is φ = 111777904.

The previous prime is 231539999. The next prime is 231540019. The reversal of 231540002 is 200045132.

It can be written as a sum of positive squares in 2 ways, for example, as 225870841 + 5669161 = 15029^2 + 2381^2 .

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

It is a super-2 number, since 2×231540002² = 107221545052320008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1995977 + ... + 1996092.

Almost surely, 2^231540002 is an apocalyptic number.

231540002 is a deficient number, since it is larger than the sum of its proper divisors (127746298).

231540002 is a wasteful number, since it uses less digits than its factorization.

231540002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992100.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 231540002 is about 15216.4385452050. The cubic root of 231540002 is about 614.0569873578.

Adding to 231540002 its reverse (200045132), we get a palindrome (431585134).

The spelling of 231540002 in words is "two hundred thirty-one million, five hundred forty thousand, two".