1963228181 has 8 divisors (see below), whose sum is σ = 2156406720. Its totient is φ = 1779034752.

The previous prime is 1963228129. The next prime is 1963228199. The reversal of 1963228181 is 1818223691.

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

It is not a de Polignac number, because 1963228181 - 2¹⁴ = 1963211797 is a prime.

It is a super-2 number, since 2×1963228181² = 7708529781345137522, 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 (1963221181) 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, 2245820 + ... + 2246693.

It is an arithmetic number, because the mean of its divisors is an integer number (269550840).

Almost surely, 2^1963228181 is an apocalyptic number.

It is an amenable number.

1963228181 is a deficient number, since it is larger than the sum of its proper divisors (193178539).

1963228181 is a wasteful number, since it uses less digits than its factorization.

1963228181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492555.

The product of its digits is 41472, while the sum is 41.

The square root of 1963228181 is about 44308.3308306689. The cubic root of 1963228181 is about 1252.1516395129.

The spelling of 1963228181 in words is "one billion, nine hundred sixty-three million, two hundred twenty-eight thousand, one hundred eighty-one".