243047631 has 8 divisors (see below), whose sum is σ = 331967664. Its totient is φ = 158079680.

The previous prime is 243047627. The next prime is 243047633. The reversal of 243047631 is 136740342.

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

It is a cyclic number.

It is not a de Polignac number, because 243047631 - 2² = 243047627 is a prime.

It is a super-2 number, since 2×243047631² = 118144301869424322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243047633) 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, 987876 + ... + 988121.

It is an arithmetic number, because the mean of its divisors is an integer number (41495958).

Almost surely, 2^243047631 is an apocalyptic number.

243047631 is a deficient number, since it is larger than the sum of its proper divisors (88920033).

243047631 is a wasteful number, since it uses less digits than its factorization.

243047631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976041.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 243047631 is about 15589.9849582994. The cubic root of 243047631 is about 624.0659164628.

Adding to 243047631 its reverse (136740342), we get a palindrome (379787973).

The spelling of 243047631 in words is "two hundred forty-three million, forty-seven thousand, six hundred thirty-one".