229990621 has 4 divisors (see below), whose sum is σ = 262846432. Its totient is φ = 197134812.

The previous prime is 229990613. The next prime is 229990627. The reversal of 229990621 is 126099922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 229990621 - 2³ = 229990613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229990627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16427895 + ... + 16427908.

It is an arithmetic number, because the mean of its divisors is an integer number (65711608).

Almost surely, 2^229990621 is an apocalyptic number.

It is an amenable number.

229990621 is a deficient number, since it is larger than the sum of its proper divisors (32855811).

229990621 is an equidigital number, since it uses as much as digits as its factorization.

229990621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32855810.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 229990621 is about 15165.4416684777. The cubic root of 229990621 is about 612.6842392305.

The spelling of 229990621 in words is "two hundred twenty-nine million, nine hundred ninety thousand, six hundred twenty-one".