42531510 has 48 divisors (see below), whose sum is σ = 118745136. Its totient is φ = 9721152.

The previous prime is 42531509. The next prime is 42531521. The reversal of 42531510 is 1513524.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12997 + ... + 15936.

It is an arithmetic number, because the mean of its divisors is an integer number (2473857).

Almost surely, 2^42531510 is an apocalyptic number.

42531510 is an abundant number, since it is smaller than the sum of its proper divisors (76213626).

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

42531510 is a wasteful number, since it uses less digits than its factorization.

42531510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28957 (or 28950 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 42531510 is about 6521.6186641048. The cubic root of 42531510 is about 349.0628261594.

The spelling of 42531510 in words is "forty-two million, five hundred thirty-one thousand, five hundred ten".