1375527431 has 4 divisors (see below), whose sum is σ = 1380493512. Its totient is φ = 1370561352.

The previous prime is 1375527421. The next prime is 1375527451. The reversal of 1375527431 is 1347255731.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375527431 is a prime.

It is a super-2 number, since 2×1375527431² = 3784151426866919522, 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 (1375527421) 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, 2482625 + ... + 2483178.

It is an arithmetic number, because the mean of its divisors is an integer number (345123378).

Almost surely, 2^1375527431 is an apocalyptic number.

1375527431 is a deficient number, since it is larger than the sum of its proper divisors (4966081).

1375527431 is an equidigital number, since it uses as much as digits as its factorization.

1375527431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4966080.

The product of its digits is 88200, while the sum is 38.

The square root of 1375527431 is about 37088.1036317577. The cubic root of 1375527431 is about 1112.1322084475.

The spelling of 1375527431 in words is "one billion, three hundred seventy-five million, five hundred twenty-seven thousand, four hundred thirty-one".