1213350155 has 8 divisors (see below), whose sum is σ = 1475966112. Its totient is φ = 957382848.

The previous prime is 1213350143. The next prime is 1213350157. The reversal of 1213350155 is 5510533121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1213350155 - 2⁶ = 1213350091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213350157) 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, 1661759 + ... + 1662488.

It is an arithmetic number, because the mean of its divisors is an integer number (184495764).

Almost surely, 2^1213350155 is an apocalyptic number.

1213350155 is a deficient number, since it is larger than the sum of its proper divisors (262615957).

1213350155 is an equidigital number, since it uses as much as digits as its factorization.

1213350155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3324325.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 1213350155 is about 34833.1760682255. The cubic root of 1213350155 is about 1066.5847830481.

Adding to 1213350155 its reverse (5510533121), we get a palindrome (6723883276).

The spelling of 1213350155 in words is "one billion, two hundred thirteen million, three hundred fifty thousand, one hundred fifty-five".