1952638181 has 16 divisors (see below), whose sum is σ = 2134863360. Its totient is φ = 1775105280.

The previous prime is 1952638169. The next prime is 1952638183. The reversal of 1952638181 is 1818362591.

It is not a de Polignac number, because 1952638181 - 2¹⁰ = 1952637157 is a prime.

It is a super-2 number, since 2×1952638181² = 7625591731797977522, 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 (1952638183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442496 + ... + 446886.

It is an arithmetic number, because the mean of its divisors is an integer number (133428960).

Almost surely, 2^1952638181 is an apocalyptic number.

It is an amenable number.

1952638181 is a deficient number, since it is larger than the sum of its proper divisors (182225179).

1952638181 is a wasteful number, since it uses less digits than its factorization.

1952638181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4916.

The product of its digits is 103680, while the sum is 44.

The square root of 1952638181 is about 44188.6657526565. The cubic root of 1952638181 is about 1249.8961366502.

The spelling of 1952638181 in words is "one billion, nine hundred fifty-two million, six hundred thirty-eight thousand, one hundred eighty-one".