1322551551 has 4 divisors (see below), whose sum is σ = 1763402072. Its totient is φ = 881701032.

The previous prime is 1322551547. The next prime is 1322551597. The reversal of 1322551551 is 1551552231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1551552231 = 3 ⋅517184077.

It is not a de Polignac number, because 1322551551 - 2² = 1322551547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322551651) 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, 220425256 + ... + 220425261.

It is an arithmetic number, because the mean of its divisors is an integer number (440850518).

Almost surely, 2^1322551551 is an apocalyptic number.

1322551551 is a deficient number, since it is larger than the sum of its proper divisors (440850521).

1322551551 is an equidigital number, since it uses as much as digits as its factorization.

1322551551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440850520.

The product of its digits is 7500, while the sum is 30.

The square root of 1322551551 is about 36366.9018614454. The cubic root of 1322551551 is about 1097.6676618024.

The spelling of 1322551551 in words is "one billion, three hundred twenty-two million, five hundred fifty-one thousand, five hundred fifty-one".