1213653156 has 24 divisors (see below), whose sum is σ = 2897715744. Its totient is φ = 395142720.

The previous prime is 1213653151. The next prime is 1213653157. The reversal of 1213653156 is 6513563121.

It is not an unprimeable number, because it can be changed into a prime (1213653151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175505 + ... + 1176536.

It is an arithmetic number, because the mean of its divisors is an integer number (120738156).

Almost surely, 2^1213653156 is an apocalyptic number.

It is an amenable number.

1213653156 is an abundant number, since it is smaller than the sum of its proper divisors (1684062588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213653156 is a wasteful number, since it uses less digits than its factorization.

1213653156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352091 (or 2352089 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

The square root of 1213653156 is about 34837.5251130157. The cubic root of 1213653156 is about 1066.6735591134.

The spelling of 1213653156 in words is "one billion, two hundred thirteen million, six hundred fifty-three thousand, one hundred fifty-six".