155277213 has 32 divisors (see below), whose sum is σ = 258435072. Its totient is φ = 80740800.

The previous prime is 155277181. The next prime is 155277229. The reversal of 155277213 is 312772551.

It is a happy number.

155277213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155277213 - 2⁵ = 155277181 is a prime.

It is a super-2 number, since 2×155277213² = 48222025754094738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155277263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15378 + ... + 23388.

It is an arithmetic number, because the mean of its divisors is an integer number (8076096).

Almost surely, 2^155277213 is an apocalyptic number.

155277213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

155277213 is a deficient number, since it is larger than the sum of its proper divisors (103157859).

155277213 is a wasteful number, since it uses less digits than its factorization.

155277213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8105.

The product of its digits is 14700, while the sum is 33.

The square root of 155277213 is about 12461.0277666010. The cubic root of 155277213 is about 537.4885815494.

It can be divided in two parts, 155277 and 213, that multiplied together give a square (33074001 = 5751²).

The spelling of 155277213 in words is "one hundred fifty-five million, two hundred seventy-seven thousand, two hundred thirteen".