1375222471537 has 4 divisors (see below), whose sum is σ = 1375956708580. Its totient is φ = 1374488234496.

The previous prime is 1375222471523. The next prime is 1375222471547. The reversal of 1375222471537 is 7351742225731.

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

It can be written as a sum of positive squares in 2 ways, for example, as 603567394816 + 771655076721 = 776896^2 + 878439^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375222471537 - 2²³ = 1375214082929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1375222471507) 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, 367115712 + ... + 367119457.

It is an arithmetic number, because the mean of its divisors is an integer number (343989177145).

Almost surely, 2^{1375222471537} is an apocalyptic number.

It is an amenable number.

1375222471537 is a deficient number, since it is larger than the sum of its proper divisors (734237043).

1375222471537 is an equidigital number, since it uses as much as digits as its factorization.

1375222471537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734237042.

The product of its digits is 2469600, while the sum is 49.

The spelling of 1375222471537 in words is "one trillion, three hundred seventy-five billion, two hundred twenty-two million, four hundred seventy-one thousand, five hundred thirty-seven".