1312223451 has 16 divisors (see below), whose sum is σ = 2181358848. Its totient is φ = 681674400.

The previous prime is 1312223447. The next prime is 1312223453. The reversal of 1312223451 is 1543222131.

It is not a de Polignac number, because 1312223451 - 2² = 1312223447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312223453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2840080 + ... + 2840541.

It is an arithmetic number, because the mean of its divisors is an integer number (136334928).

Almost surely, 2^1312223451 is an apocalyptic number.

1312223451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1312223451 is a deficient number, since it is larger than the sum of its proper divisors (869135397).

1312223451 is a wasteful number, since it uses less digits than its factorization.

1312223451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5680642.

The product of its digits is 1440, while the sum is 24.

The square root of 1312223451 is about 36224.6249255945. The cubic root of 1312223451 is about 1094.8028810537.

Adding to 1312223451 its reverse (1543222131), we get a palindrome (2855445582).

The spelling of 1312223451 in words is "one billion, three hundred twelve million, two hundred twenty-three thousand, four hundred fifty-one".