250013530 has 24 divisors (see below), whose sum is σ = 487307772. Its totient is φ = 92312064.

The previous prime is 250013521. The next prime is 250013557. The reversal of 250013530 is 35310052.

It can be written as a sum of positive squares in 6 ways, for example, as 58384881 + 191628649 = 7641^2 + 13843^2 .

It is a junction number, because it is equal to n+sod(n) for n = 250013498 and 250013507.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72279 + ... + 75658.

Almost surely, 2^250013530 is an apocalyptic number.

250013530 is a deficient number, since it is larger than the sum of its proper divisors (237294242).

250013530 is a wasteful number, since it uses less digits than its factorization.

250013530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147970 (or 147957 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 250013530 is about 15811.8161512206. The cubic root of 250013530 is about 629.9718892303.

Adding to 250013530 its reverse (35310052), we get a palindrome (285323582).

The spelling of 250013530 in words is "two hundred fifty million, thirteen thousand, five hundred thirty".