42531550 has 12 divisors (see below), whose sum is σ = 79108776. Its totient is φ = 17012600.

The previous prime is 42531547. The next prime is 42531563. The reversal of 42531550 is 5513524.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 425266 + ... + 425365.

It is an arithmetic number, because the mean of its divisors is an integer number (6592398).

Almost surely, 2^42531550 is an apocalyptic number.

42531550 is a deficient number, since it is larger than the sum of its proper divisors (36577226).

42531550 is a wasteful number, since it uses less digits than its factorization.

42531550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850643 (or 850638 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 42531550 is about 6521.6217308274. The cubic root of 42531550 is about 349.0629355881.

The spelling of 42531550 in words is "forty-two million, five hundred thirty-one thousand, five hundred fifty".