1213154353 has 4 divisors (see below), whose sum is σ = 1213224768. Its totient is φ = 1213083940.

The previous prime is 1213154333. The next prime is 1213154359. The reversal of 1213154353 is 3534513121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3534513121 = 5689 ⋅621289.

It is a cyclic number.

It is not a de Polignac number, because 1213154353 - 2¹³ = 1213146161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213154359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9900 + ... + 50242.

It is an arithmetic number, because the mean of its divisors is an integer number (303306192).

Almost surely, 2^1213154353 is an apocalyptic number.

It is an amenable number.

1213154353 is a deficient number, since it is larger than the sum of its proper divisors (70415).

1213154353 is an equidigital number, since it uses as much as digits as its factorization.

1213154353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70414.

The product of its digits is 5400, while the sum is 28.

The square root of 1213154353 is about 34830.3653871159. The cubic root of 1213154353 is about 1066.5274072863.

Adding to 1213154353 its reverse (3534513121), we get a palindrome (4747667474).

The spelling of 1213154353 in words is "one billion, two hundred thirteen million, one hundred fifty-four thousand, three hundred fifty-three".