252321530 has 8 divisors (see below), whose sum is σ = 454178772. Its totient is φ = 100928608.

The previous prime is 252321529. The next prime is 252321551. The reversal of 252321530 is 35123252.

It can be written as a sum of positive squares in 2 ways, for example, as 240343009 + 11978521 = 15503^2 + 3461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 252321496 and 252321505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12616067 + ... + 12616086.

Almost surely, 2^252321530 is an apocalyptic number.

252321530 is a deficient number, since it is larger than the sum of its proper divisors (201857242).

252321530 is a wasteful number, since it uses less digits than its factorization.

252321530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25232160.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 252321530 is about 15884.6318811611. The cubic root of 252321530 is about 631.9044830412.

Adding to 252321530 its reverse (35123252), we get a palindrome (287444782).

It can be divided in two parts, 25232 and 1530, that added together give a palindrome (26762).

The spelling of 252321530 in words is "two hundred fifty-two million, three hundred twenty-one thousand, five hundred thirty".