40019161 has 8 divisors (see below), whose sum is σ = 49254464. Its totient is φ = 31663440.

The previous prime is 40019141. The next prime is 40019179. The reversal of 40019161 is 16191004.

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

It is a cyclic number.

It is not a de Polignac number, because 40019161 - 2¹¹ = 40017113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40019131) 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, 219795 + ... + 219976.

It is an arithmetic number, because the mean of its divisors is an integer number (6156808).

Almost surely, 2^40019161 is an apocalyptic number.

It is an amenable number.

40019161 is a deficient number, since it is larger than the sum of its proper divisors (9235303).

40019161 is a wasteful number, since it uses less digits than its factorization.

40019161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439791.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 40019161 is about 6326.0699490284. The cubic root of 40019161 is about 342.0497887000.

The spelling of 40019161 in words is "forty million, nineteen thousand, one hundred sixty-one".