155023011 has 32 divisors (see below), whose sum is σ = 269821440. Its totient is φ = 86724000.

The previous prime is 155023003. The next prime is 155023073. The reversal of 155023011 is 110320551.

It is not a de Polignac number, because 155023011 - 2³ = 155023003 is a prime.

It is a super-2 number, since 2×155023011² = 48064267879012242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155023711) 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, 16215 + ... + 23936.

It is an arithmetic number, because the mean of its divisors is an integer number (8431920).

Almost surely, 2^155023011 is an apocalyptic number.

155023011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155023011 is a deficient number, since it is larger than the sum of its proper divisors (114798429).

155023011 is a wasteful number, since it uses less digits than its factorization.

155023011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40184 (or 40178 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 155023011 is about 12450.8237076910. The cubic root of 155023011 is about 537.1951165128.

Adding to 155023011 its reverse (110320551), we get a palindrome (265343562).

The spelling of 155023011 in words is "one hundred fifty-five million, twenty-three thousand, eleven".