155240012 has 12 divisors (see below), whose sum is σ = 279012720. Its totient is φ = 75522096.

The previous prime is 155240011. The next prime is 155240017. The reversal of 155240012 is 210042551.

It is a super-2 number, since 2×155240012² = 48198922651520288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155240011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524312 + ... + 524607.

It is an arithmetic number, because the mean of its divisors is an integer number (23251060).

Almost surely, 2^155240012 is an apocalyptic number.

It is an amenable number.

155240012 is a deficient number, since it is larger than the sum of its proper divisors (123772708).

155240012 is a wasteful number, since it uses less digits than its factorization.

155240012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048960 (or 1048958 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 155240012 is about 12459.5349832969. The cubic root of 155240012 is about 537.4456546461.

Adding to 155240012 its reverse (210042551), we get a palindrome (365282563).

The spelling of 155240012 in words is "one hundred fifty-five million, two hundred forty thousand, twelve".