405543157 has 4 divisors (see below), whose sum is σ = 405655360. Its totient is φ = 405430956.

The previous prime is 405543139. The next prime is 405543169. The reversal of 405543157 is 751345504.

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 405543157 - 2⁷ = 405543029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405543197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50493 + ... + 57970.

It is an arithmetic number, because the mean of its divisors is an integer number (101413840).

Almost surely, 2^405543157 is an apocalyptic number.

It is an amenable number.

405543157 is a deficient number, since it is larger than the sum of its proper divisors (112203).

405543157 is a wasteful number, since it uses less digits than its factorization.

405543157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112202.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 405543157 is about 20138.1021201105. The cubic root of 405543157 is about 740.1942252536.

The spelling of 405543157 in words is "four hundred five million, five hundred forty-three thousand, one hundred fifty-seven".