375221281 has 4 divisors (see below), whose sum is σ = 375420564. Its totient is φ = 375022000.

The previous prime is 375221279. The next prime is 375221293. The reversal of 375221281 is 182122573.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182122573 = 8293 ⋅21961.

It can be written as a sum of positive squares in 2 ways, for example, as 161798400 + 213422881 = 12720^2 + 14609^2 .

It is a cyclic number.

It is not a de Polignac number, because 375221281 - 2¹ = 375221279 is a prime.

It is a super-2 number, since 2×375221281² = 281582019430561922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (375221251) 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, 96790 + ... + 100591.

It is an arithmetic number, because the mean of its divisors is an integer number (93855141).

Almost surely, 2^375221281 is an apocalyptic number.

It is an amenable number.

375221281 is a deficient number, since it is larger than the sum of its proper divisors (199283).

375221281 is a wasteful number, since it uses less digits than its factorization.

375221281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199282.

The product of its digits is 6720, while the sum is 31.

The square root of 375221281 is about 19370.6293392858. The cubic root of 375221281 is about 721.2665983423.

The spelling of 375221281 in words is "three hundred seventy-five million, two hundred twenty-one thousand, two hundred eighty-one".