42525031 has 4 divisors (see below), whose sum is σ = 42703200. Its totient is φ = 42346864.

The previous prime is 42525023. The next prime is 42525053. The reversal of 42525031 is 13052524.

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 42525031 - 2³ = 42525023 is a prime.

It is a super-2 number, since 2×42525031² = 3616756523101922, 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 = 42524993 and 42525011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42525731) 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, 88726 + ... + 89203.

It is an arithmetic number, because the mean of its divisors is an integer number (10675800).

Almost surely, 2^42525031 is an apocalyptic number.

42525031 is a deficient number, since it is larger than the sum of its proper divisors (178169).

42525031 is a wasteful number, since it uses less digits than its factorization.

42525031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178168.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 42525031 is about 6521.1219126773. The cubic root of 42525031 is about 349.0451005335.

Adding to 42525031 its reverse (13052524), we get a palindrome (55577555).

The spelling of 42525031 in words is "forty-two million, five hundred twenty-five thousand, thirty-one".