4187222381 has 4 divisors (see below), whose sum is σ = 4369275552. Its totient is φ = 4005169212.

The previous prime is 4187222371. The next prime is 4187222387. The reversal of 4187222381 is 1832227814.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1832227814 = 2 ⋅916113907.

It is a cyclic number.

It is not a de Polignac number, because 4187222381 - 2⁶ = 4187222317 is a prime.

It is a super-2 number, since 2×4187222381² = 35065662535894618322, 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 (4187222387) 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, 91026551 + ... + 91026596.

It is an arithmetic number, because the mean of its divisors is an integer number (1092318888).

Almost surely, 2^4187222381 is an apocalyptic number.

It is an amenable number.

4187222381 is a deficient number, since it is larger than the sum of its proper divisors (182053171).

4187222381 is a wasteful number, since it uses less digits than its factorization.

4187222381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182053170.

The product of its digits is 43008, while the sum is 38.

The square root of 4187222381 is about 64708.7504206348. The cubic root of 4187222381 is about 1611.7908112371.

The spelling of 4187222381 in words is "four billion, one hundred eighty-seven million, two hundred twenty-two thousand, three hundred eighty-one".