1213250530 has 24 divisors (see below), whose sum is σ = 2204659548. Its totient is φ = 480719328.

The previous prime is 1213250513. The next prime is 1213250537. The reversal of 1213250530 is 350523121.

It can be written as a sum of positive squares in 2 ways, for example, as 1051121241 + 162129289 = 32421^2 + 12733^2 .

It is not an unprimeable number, because it can be changed into a prime (1213250537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109192 + ... + 119788.

Almost surely, 2^1213250530 is an apocalyptic number.

1213250530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213250530 is a deficient number, since it is larger than the sum of its proper divisors (991409018).

1213250530 is a wasteful number, since it uses less digits than its factorization.

1213250530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10818 (or 10711 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1213250530 is about 34831.7460084906. The cubic root of 1213250530 is about 1066.5555907557. Note that the first 4 decimals are identical.

Adding to 1213250530 its reverse (350523121), we get a palindrome (1563773651).

The spelling of 1213250530 in words is "one billion, two hundred thirteen million, two hundred fifty thousand, five hundred thirty".