42211501 has 4 divisors (see below), whose sum is σ = 43667100. Its totient is φ = 40755904.

The previous prime is 42211439. The next prime is 42211523. The reversal of 42211501 is 10511224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10017225 + 32194276 = 3165^2 + 5674^2 .

It is not a de Polignac number, because 42211501 - 2¹⁵ = 42178733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42211531) 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, 727756 + ... + 727813.

It is an arithmetic number, because the mean of its divisors is an integer number (10916775).

Almost surely, 2^42211501 is an apocalyptic number.

It is an amenable number.

42211501 is a deficient number, since it is larger than the sum of its proper divisors (1455599).

42211501 is a wasteful number, since it uses less digits than its factorization.

42211501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455598.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 42211501 is about 6497.0378635190. The cubic root of 42211501 is about 348.1851664641.

Adding to 42211501 its reverse (10511224), we get a palindrome (52722725).

The spelling of 42211501 in words is "forty-two million, two hundred eleven thousand, five hundred one".