1375436221 has 8 divisors (see below), whose sum is σ = 1456678080. Its totient is φ = 1294231488.

The previous prime is 1375436213. The next prime is 1375436263. The reversal of 1375436221 is 1226345731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1375436221 - 2³ = 1375436213 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 (1375436521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113560 + ... + 125086.

It is an arithmetic number, because the mean of its divisors is an integer number (182084760).

Almost surely, 2^1375436221 is an apocalyptic number.

It is an amenable number.

1375436221 is a deficient number, since it is larger than the sum of its proper divisors (81241859).

1375436221 is a wasteful number, since it uses less digits than its factorization.

1375436221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18563.

The product of its digits is 30240, while the sum is 34.

The square root of 1375436221 is about 37086.8739717976. The cubic root of 1375436221 is about 1112.1076264051.

The spelling of 1375436221 in words is "one billion, three hundred seventy-five million, four hundred thirty-six thousand, two hundred twenty-one".