231220738 has 16 divisors (see below), whose sum is σ = 397197504. Its totient is φ = 98889840.

The previous prime is 231220727. The next prime is 231220739. The reversal of 231220738 is 837022132.

It is not an unprimeable number, because it can be changed into a prime (231220739) 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, 9945 + ... + 23692.

It is an arithmetic number, because the mean of its divisors is an integer number (24824844).

Almost surely, 2^231220738 is an apocalyptic number.

231220738 is a deficient number, since it is larger than the sum of its proper divisors (165976766).

231220738 is a wasteful number, since it uses less digits than its factorization.

231220738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34137.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 231220738 is about 15205.9441666738. The cubic root of 231220738 is about 613.7746222301.

The spelling of 231220738 in words is "two hundred thirty-one million, two hundred twenty thousand, seven hundred thirty-eight".