1345356631 has 4 divisors (see below), whose sum is σ = 1388755264. Its totient is φ = 1301958000.

The previous prime is 1345356629. The next prime is 1345356637. The reversal of 1345356631 is 1366535431.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1345356631 - 2¹ = 1345356629 is a prime.

It is a super-2 number, since 2×1345356631² = 3619968929151340322, 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 (1345356637) 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, 21699270 + ... + 21699331.

It is an arithmetic number, because the mean of its divisors is an integer number (347188816).

Almost surely, 2^1345356631 is an apocalyptic number.

1345356631 is a deficient number, since it is larger than the sum of its proper divisors (43398633).

1345356631 is an equidigital number, since it uses as much as digits as its factorization.

1345356631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43398632.

The product of its digits is 97200, while the sum is 37.

The square root of 1345356631 is about 36679.1034650521. The cubic root of 1345356631 is about 1103.9408593849.

The spelling of 1345356631 in words is "one billion, three hundred forty-five million, three hundred fifty-six thousand, six hundred thirty-one".