40621191 has 16 divisors (see below), whose sum is σ = 60211200. Its totient is φ = 24190560.

The previous prime is 40621121. The next prime is 40621223. The reversal of 40621191 is 19112604.

It is not a de Polignac number, because 40621191 - 2¹¹ = 40619143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40621121) 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, 15591 + ... + 18008.

It is an arithmetic number, because the mean of its divisors is an integer number (3763200).

Almost surely, 2^40621191 is an apocalyptic number.

40621191 is a deficient number, since it is larger than the sum of its proper divisors (19590009).

40621191 is a wasteful number, since it uses less digits than its factorization.

40621191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33646.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 40621191 is about 6373.4755824432. The cubic root of 40621191 is about 343.7564725613.

Adding to 40621191 its reverse (19112604), we get a palindrome (59733795).

It can be divided in two parts, 4062 and 1191, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 40621191 in words is "forty million, six hundred twenty-one thousand, one hundred ninety-one".