405250133 has 4 divisors (see below), whose sum is σ = 422869728. Its totient is φ = 387630540.

The previous prime is 405250123. The next prime is 405250217. The reversal of 405250133 is 331052504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405250133 - 2¹⁴ = 405233749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 17619571 = 405250133 / (4 + 0 + 5 + 2 + 5 + 0 + 1 + 3 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 405250099 and 405250108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405250123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8809763 + ... + 8809808.

It is an arithmetic number, because the mean of its divisors is an integer number (105717432).

Almost surely, 2^405250133 is an apocalyptic number.

It is an amenable number.

405250133 is a deficient number, since it is larger than the sum of its proper divisors (17619595).

405250133 is a wasteful number, since it uses less digits than its factorization.

405250133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17619594.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 405250133 is about 20130.8254425893. The cubic root of 405250133 is about 740.0159072548.

The spelling of 405250133 in words is "four hundred five million, two hundred fifty thousand, one hundred thirty-three".