155438211 has 8 divisors (see below), whose sum is σ = 207335440. Its totient is φ = 103583232.

The previous prime is 155438203. The next prime is 155438237. The reversal of 155438211 is 112834551.

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

It is not a de Polignac number, because 155438211 - 2³ = 155438203 is a prime.

It is a super-2 number, since 2×155438211² = 48322074877761042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155438201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646 + ... + 17643.

It is an arithmetic number, because the mean of its divisors is an integer number (25916930).

Almost surely, 2^155438211 is an apocalyptic number.

155438211 is a deficient number, since it is larger than the sum of its proper divisors (51897229).

155438211 is a wasteful number, since it uses less digits than its factorization.

155438211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21125.

The product of its digits is 4800, while the sum is 30.

The square root of 155438211 is about 12467.4861539927. The cubic root of 155438211 is about 537.6742810362.

The spelling of 155438211 in words is "one hundred fifty-five million, four hundred thirty-eight thousand, two hundred eleven".