213505154 has 8 divisors (see below), whose sum is σ = 320427900. Its totient is φ = 106695856.

The previous prime is 213505151. The next prime is 213505157. The reversal of 213505154 is 451505312.

It is an interprime number because it is at equal distance from previous prime (213505151) and next prime (213505157).

It can be written as a sum of positive squares in 2 ways, for example, as 170955625 + 42549529 = 13075^2 + 6523^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (213505151) 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, 23489 + ... + 31284.

Almost surely, 2^213505154 is an apocalyptic number.

213505154 is a deficient number, since it is larger than the sum of its proper divisors (106922746).

213505154 is a wasteful number, since it uses less digits than its factorization.

213505154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56724.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 213505154 is about 14611.8155613873. The cubic root of 213505154 is about 597.6810060665.

The spelling of 213505154 in words is "two hundred thirteen million, five hundred five thousand, one hundred fifty-four".