155012011 has 24 divisors (see below), whose sum is σ = 195924960. Its totient is φ = 120046080.

The previous prime is 155011999. The next prime is 155012017. The reversal of 155012011 is 110210551.

It is not a de Polignac number, because 155012011 - 2¹³ = 155003819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155012017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166395 + ... + 167323.

It is an arithmetic number, because the mean of its divisors is an integer number (8163540).

Almost surely, 2^155012011 is an apocalyptic number.

155012011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155012011 is a deficient number, since it is larger than the sum of its proper divisors (40912949).

155012011 is a wasteful number, since it uses less digits than its factorization.

155012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 155012011 is about 12450.3819620122. The cubic root of 155012011 is about 537.1824102571.

Adding to 155012011 its reverse (110210551), we get a palindrome (265222562).

The spelling of 155012011 in words is "one hundred fifty-five million, twelve thousand, eleven".