42531378 has 16 divisors (see below), whose sum is σ = 85889856. Its totient is φ = 14039280.

The previous prime is 42531373. The next prime is 42531413. The reversal of 42531378 is 87313524.

It is a super-2 number, since 2×42531378² = 3617836229157768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42531373) 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, 33793 + ... + 35028.

It is an arithmetic number, because the mean of its divisors is an integer number (5368116).

Almost surely, 2^42531378 is an apocalyptic number.

42531378 is an abundant number, since it is smaller than the sum of its proper divisors (43358478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42531378 is a wasteful number, since it uses less digits than its factorization.

42531378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68929.

The product of its digits is 20160, while the sum is 33.

The square root of 42531378 is about 6521.6085439100. The cubic root of 42531378 is about 349.0624650440.

The spelling of 42531378 in words is "forty-two million, five hundred thirty-one thousand, three hundred seventy-eight".