42730551 has 16 divisors (see below), whose sum is σ = 63460320. Its totient is φ = 28416960.

The previous prime is 42730549. The next prime is 42730559. The reversal of 42730551 is 15503724.

It is a happy number.

42730551 is a `hidden beast` number, since 42 + 73 + 0 + 551 = 666.

It is not a de Polignac number, because 42730551 - 2¹ = 42730549 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42730559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10731 + ... + 14163.

It is an arithmetic number, because the mean of its divisors is an integer number (3966270).

Almost surely, 2^42730551 is an apocalyptic number.

42730551 is a deficient number, since it is larger than the sum of its proper divisors (20729769).

42730551 is a wasteful number, since it uses less digits than its factorization.

42730551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903 (or 3897 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 42730551 is about 6536.8609439088. The cubic root of 42730551 is about 349.6064992543.

The spelling of 42730551 in words is "forty-two million, seven hundred thirty thousand, five hundred fifty-one".