229211640 has 128 divisors (see below), whose sum is σ = 873216000. Its totient is φ = 52389504.

The previous prime is 229211639. The next prime is 229211657. The reversal of 229211640 is 46112922.

229211640 is a `hidden beast` number, since 2 + 2 + 9 + 2 + 11 + 640 = 666.

It is a super-2 number, since 2×229211640² = 105075951822979200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7600 + ... + 22719.

It is an arithmetic number, because the mean of its divisors is an integer number (6822000).

Almost surely, 2^229211640 is an apocalyptic number.

229211640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229211640 is an abundant number, since it is smaller than the sum of its proper divisors (644004360).

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

229211640 is a wasteful number, since it uses less digits than its factorization.

229211640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30346 (or 30336 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 229211640 is about 15139.7371179291. The cubic root of 229211640 is about 611.9917338368.

The spelling of 229211640 in words is "two hundred twenty-nine million, two hundred eleven thousand, six hundred forty".