155406271 has 4 divisors (see below), whose sum is σ = 155438712. Its totient is φ = 155373832.

The previous prime is 155406259. The next prime is 155406283. The reversal of 155406271 is 172604551.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (155406259) and next prime (155406283).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155406271 is a prime.

It is a super-2 number, since 2×155406271² = 48302218132250882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155406211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7456 + ... + 19141.

It is an arithmetic number, because the mean of its divisors is an integer number (38859678).

Almost surely, 2^155406271 is an apocalyptic number.

155406271 is a deficient number, since it is larger than the sum of its proper divisors (32441).

155406271 is an equidigital number, since it uses as much as digits as its factorization.

155406271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32440.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 155406271 is about 12466.2051563417. The cubic root of 155406271 is about 537.6374507681.

The spelling of 155406271 in words is "one hundred fifty-five million, four hundred six thousand, two hundred seventy-one".