321240552 has 32 divisors (see below), whose sum is σ = 803606400. Its totient is φ = 107012864.

The previous prime is 321240547. The next prime is 321240559. The reversal of 321240552 is 255042123.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (321240559) 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, 47953 + ... + 54239.

It is an arithmetic number, because the mean of its divisors is an integer number (25112700).

Almost surely, 2^321240552 is an apocalyptic number.

It is an amenable number.

321240552 is an abundant number, since it is smaller than the sum of its proper divisors (482365848).

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

321240552 is a wasteful number, since it uses less digits than its factorization.

321240552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8425 (or 8421 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 321240552 is about 17923.1847616432. The cubic root of 321240552 is about 684.8731198035.

Adding to 321240552 its reverse (255042123), we get a palindrome (576282675).

The spelling of 321240552 in words is "three hundred twenty-one million, two hundred forty thousand, five hundred fifty-two".