252021430 has 64 divisors (see below), whose sum is σ = 499374720. Its totient is φ = 91183104.

The previous prime is 252021403. The next prime is 252021457. The reversal of 252021430 is 34120252.

252021430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (252021403) and next prime (252021457).

It is a junction number, because it is equal to n+sod(n) for n = 252021398 and 252021407.

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, 647676 + ... + 648064.

It is an arithmetic number, because the mean of its divisors is an integer number (7802730).

Almost surely, 2^252021430 is an apocalyptic number.

252021430 is a deficient number, since it is larger than the sum of its proper divisors (247353290).

252021430 is a wasteful number, since it uses less digits than its factorization.

252021430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 252021430 is about 15875.1828335928. The cubic root of 252021430 is about 631.6538639653.

Adding to 252021430 its reverse (34120252), we get a palindrome (286141682).

The spelling of 252021430 in words is "two hundred fifty-two million, twenty-one thousand, four hundred thirty".