1345551431 has 8 divisors (see below), whose sum is σ = 1545062784. Its totient is φ = 1147862520.

The previous prime is 1345551409. The next prime is 1345551437. The reversal of 1345551431 is 1341555431.

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

It is not a de Polignac number, because 1345551431 - 2¹⁰ = 1345550407 is a prime.

It is a super-2 number, since 2×1345551431² = 3621017306932295522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345551437) 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, 454025 + ... + 456978.

It is an arithmetic number, because the mean of its divisors is an integer number (193132848).

Almost surely, 2^1345551431 is an apocalyptic number.

1345551431 is a deficient number, since it is larger than the sum of its proper divisors (199511353).

1345551431 is an equidigital number, since it uses as much as digits as its factorization.

1345551431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911221.

The product of its digits is 18000, while the sum is 32.

The square root of 1345551431 is about 36681.7588318772. The cubic root of 1345551431 is about 1103.9941382692.

The spelling of 1345551431 in words is "one billion, three hundred forty-five million, five hundred fifty-one thousand, four hundred thirty-one".