42451311 has 16 divisors (see below), whose sum is σ = 64779264. Its totient is φ = 24223584.

The previous prime is 42451291. The next prime is 42451319. The reversal of 42451311 is 11315424.

It is not a de Polignac number, because 42451311 - 2¹⁸ = 42189167 is a prime.

It is a super-2 number, since 2×42451311² = 3604227611237442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42451319) 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, 26026 + ... + 27608.

It is an arithmetic number, because the mean of its divisors is an integer number (4048704).

Almost surely, 2^42451311 is an apocalyptic number.

42451311 is a deficient number, since it is larger than the sum of its proper divisors (22327953).

42451311 is a wasteful number, since it uses less digits than its factorization.

42451311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870.

The product of its digits is 480, while the sum is 21.

The square root of 42451311 is about 6515.4670592368. The cubic root of 42451311 is about 348.8432861535.

Adding to 42451311 its reverse (11315424), we get a palindrome (53766735).

The spelling of 42451311 in words is "forty-two million, four hundred fifty-one thousand, three hundred eleven".