42251131 has 8 divisors (see below), whose sum is σ = 45561824. Its totient is φ = 38949120.

The previous prime is 42251119. The next prime is 42251149. The reversal of 42251131 is 13115224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42251131 - 2⁹ = 42250619 is a prime.

It is a super-2 number, since 2×42251131² = 3570316141558322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42251099 and 42251108.

It is not an unprimeable number, because it can be changed into a prime (42251191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10891 + ... + 14251.

It is an arithmetic number, because the mean of its divisors is an integer number (5695228).

Almost surely, 2^42251131 is an apocalyptic number.

42251131 is a deficient number, since it is larger than the sum of its proper divisors (3310693).

42251131 is a wasteful number, since it uses less digits than its factorization.

42251131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341.

The product of its digits is 240, while the sum is 19.

The square root of 42251131 is about 6500.0869994178. The cubic root of 42251131 is about 348.2940961937.

Adding to 42251131 its reverse (13115224), we get a palindrome (55366355).

It can be divided in two parts, 4225 and 1131, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 42251131 in words is "forty-two million, two hundred fifty-one thousand, one hundred thirty-one".