163542730 has 32 divisors (see below), whose sum is σ = 318047184. Its totient is φ = 60189696.

The previous prime is 163542707. The next prime is 163542733. The reversal of 163542730 is 37245361.

It can be written as a sum of positive squares in 8 ways, for example, as 27657081 + 135885649 = 5259^2 + 11657^2 .

It is a super-3 number, since 3×163542730³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163542692 and 163542701.

It is not an unprimeable number, because it can be changed into a prime (163542733) 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, 41944 + ... + 45676.

Almost surely, 2^163542730 is an apocalyptic number.

163542730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163542730 is a deficient number, since it is larger than the sum of its proper divisors (154504454).

163542730 is a wasteful number, since it uses less digits than its factorization.

163542730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 163542730 is about 12788.3826186113. The cubic root of 163542730 is about 546.8611621206.

The spelling of 163542730 in words is "one hundred sixty-three million, five hundred forty-two thousand, seven hundred thirty".