601221640 has 32 divisors (see below), whose sum is σ = 1355616000. Its totient is φ = 239978944.

The previous prime is 601221563. The next prime is 601221641. The reversal of 601221640 is 46122106.

It is a super-2 number, since 2×601221640² = 722934920808579200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (601221641) 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, 3471 + ... + 34849.

It is an arithmetic number, because the mean of its divisors is an integer number (42363000).

Almost surely, 2^601221640 is an apocalyptic number.

It is an amenable number.

601221640 is an abundant number, since it is smaller than the sum of its proper divisors (754394360).

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

601221640 is a wasteful number, since it uses less digits than its factorization.

601221640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31869 (or 31865 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 601221640 is about 24519.8213696593. The cubic root of 601221640 is about 844.0047056183.

Adding to 601221640 its reverse (46122106), we get a palindrome (647343746).

The spelling of 601221640 in words is "six hundred one million, two hundred twenty-one thousand, six hundred forty".