42390136233 has 12 divisors (see below), whose sum is σ = 61232080260. Its totient is φ = 28259221536.

The previous prime is 42390136211. The next prime is 42390136249. The reversal of 42390136233 is 33263109324.

42390136233 is a `hidden beast` number, since 4 + 2 + 390 + 1 + 36 + 233 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1930020624 + 40460115609 = 43932^2 + 201147^2 .

It is not a de Polignac number, because 42390136233 - 2⁹ = 42390135721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42390136253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395463 + ... + 491091.

It is an arithmetic number, because the mean of its divisors is an integer number (5102673355).

Almost surely, 2^42390136233 is an apocalyptic number.

It is an amenable number.

42390136233 is a deficient number, since it is larger than the sum of its proper divisors (18841944027).

42390136233 is a wasteful number, since it uses less digits than its factorization.

42390136233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144888 (or 144885 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 36.

The spelling of 42390136233 in words is "forty-two billion, three hundred ninety million, one hundred thirty-six thousand, two hundred thirty-three".