40189551 has 4 divisors (see below), whose sum is σ = 53586072. Its totient is φ = 26793032.

The previous prime is 40189543. The next prime is 40189573. The reversal of 40189551 is 15598104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40189551 - 2³ = 40189543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40181551) 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, 6698256 + ... + 6698261.

It is an arithmetic number, because the mean of its divisors is an integer number (13396518).

Almost surely, 2^40189551 is an apocalyptic number.

40189551 is a deficient number, since it is larger than the sum of its proper divisors (13396521).

40189551 is a wasteful number, since it uses less digits than its factorization.

40189551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13396520.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 40189551 is about 6339.5229315777. The cubic root of 40189551 is about 342.5345510103.

The spelling of 40189551 in words is "forty million, one hundred eighty-nine thousand, five hundred fifty-one".