1213156630 has 16 divisors (see below), whose sum is σ = 2495636640. Its totient is φ = 415939392.

The previous prime is 1213156613. The next prime is 1213156649. The reversal of 1213156630 is 366513121.

1213156630 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8665335 + ... + 8665474.

It is an arithmetic number, because the mean of its divisors is an integer number (155977290).

Almost surely, 2^1213156630 is an apocalyptic number.

1213156630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213156630 is an abundant number, since it is smaller than the sum of its proper divisors (1282480010).

1213156630 is a wasteful number, since it uses less digits than its factorization.

1213156630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17330823.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1213156630 is about 34830.3980740961. The cubic root of 1213156630 is about 1066.5280745499.

Adding to 1213156630 its reverse (366513121), we get a palindrome (1579669751).

The spelling of 1213156630 in words is "one billion, two hundred thirteen million, one hundred fifty-six thousand, six hundred thirty".