231541002 has 72 divisors (see below), whose sum is σ = 630241248. Its totient is φ = 60136560.

The previous prime is 231540997. The next prime is 231541007. The reversal of 231541002 is 200145132.

It is an interprime number because it is at equal distance from previous prime (231540997) and next prime (231541007).

It is a super-2 number, since 2×231541002² = 107222471214328008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (231541007) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7653 + ... + 22839.

Almost surely, 2^231541002 is an apocalyptic number.

231541002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 231541002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315120624).

231541002 is an abundant number, since it is smaller than the sum of its proper divisors (398700246).

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

231541002 is a wasteful number, since it uses less digits than its factorization.

231541002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15224 (or 15210 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 231541002 is about 15216.4714043697. The cubic root of 231541002 is about 614.0578713751.

Adding to 231541002 its reverse (200145132), we get a palindrome (431686134).

The spelling of 231541002 in words is "two hundred thirty-one million, five hundred forty-one thousand, two".