252021555 has 24 divisors (see below), whose sum is σ = 437968752. Its totient is φ = 134063424.

The previous prime is 252021551. The next prime is 252021569. The reversal of 252021555 is 555120252.

252021555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 252021555 - 2² = 252021551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252021551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10812 + ... + 24918.

It is an arithmetic number, because the mean of its divisors is an integer number (18248698).

Almost surely, 2^252021555 is an apocalyptic number.

252021555 is a deficient number, since it is larger than the sum of its proper divisors (185947197).

252021555 is a wasteful number, since it uses less digits than its factorization.

252021555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14515 (or 14512 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 252021555 is about 15875.1867705549. The cubic root of 252021555 is about 631.6539683965.

The spelling of 252021555 in words is "two hundred fifty-two million, twenty-one thousand, five hundred fifty-five".