42400311 has 4 divisors (see below), whose sum is σ = 56533752. Its totient is φ = 28266872.

The previous prime is 42400297. The next prime is 42400321. The reversal of 42400311 is 11300424.

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 42400311 - 2¹⁵ = 42367543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42400321) 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, 7066716 + ... + 7066721.

It is an arithmetic number, because the mean of its divisors is an integer number (14133438).

Almost surely, 2^42400311 is an apocalyptic number.

42400311 is a deficient number, since it is larger than the sum of its proper divisors (14133441).

42400311 is a wasteful number, since it uses less digits than its factorization.

42400311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14133440.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 42400311 is about 6511.5521191188. The cubic root of 42400311 is about 348.7035328180.

Adding to 42400311 its reverse (11300424), we get a palindrome (53700735).

The spelling of 42400311 in words is "forty-two million, four hundred thousand, three hundred eleven".