1345555431 has 48 divisors (see below), whose sum is σ = 2199738528. Its totient is φ = 785376000.

The previous prime is 1345555429. The next prime is 1345555459.

1345555431 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1345555431 - 2¹ = 1345555429 is a prime.

It is a super-2 number, since 2×1345555431² = 3621038835787191522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345555411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 368145 + ... + 371781.

It is an arithmetic number, because the mean of its divisors is an integer number (45827886).

Almost surely, 2^1345555431 is an apocalyptic number.

1345555431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1345555431 is a deficient number, since it is larger than the sum of its proper divisors (854183097).

1345555431 is a wasteful number, since it uses less digits than its factorization.

1345555431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792 (or 3789 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 1345555431 is about 36681.8133548493. The cubic root of 1345555431 is about 1103.9952322376.

It can be divided in two parts, 13455 and 55431, that added together give a palindrome (68886).

The spelling of 1345555431 in words is "one billion, three hundred forty-five million, five hundred fifty-five thousand, four hundred thirty-one".