1345556311 has 4 divisors (see below), whose sum is σ = 1467879624. Its totient is φ = 1223233000.

The previous prime is 1345556309. The next prime is 1345556321. The reversal of 1345556311 is 1136555431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1136555431 = 11 ⋅103323221.

It is not a de Polignac number, because 1345556311 - 2¹ = 1345556309 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 (1345556321) 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, 61161640 + ... + 61161661.

It is an arithmetic number, because the mean of its divisors is an integer number (366969906).

Almost surely, 2^1345556311 is an apocalyptic number.

1345556311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1345556311 is a deficient number, since it is larger than the sum of its proper divisors (122323313).

1345556311 is a wasteful number, since it uses less digits than its factorization.

1345556311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122323312.

The product of its digits is 27000, while the sum is 34.

The square root of 1345556311 is about 36681.8253498923. The cubic root of 1345556311 is about 1103.9954729104.

The spelling of 1345556311 in words is "one billion, three hundred forty-five million, five hundred fifty-six thousand, three hundred eleven".