155242212205 has 16 divisors (see below), whose sum is σ = 192786067584. Its totient is φ = 119914741440.

The previous prime is 155242212163. The next prime is 155242212227. The reversal of 155242212205 is 502212242551.

It is not a de Polignac number, because 155242212205 - 2⁷ = 155242212077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3178617 + ... + 3227086.

It is an arithmetic number, because the mean of its divisors is an integer number (12049129224).

Almost surely, 2^155242212205 is an apocalyptic number.

It is an amenable number.

155242212205 is a deficient number, since it is larger than the sum of its proper divisors (37543855379).

155242212205 is a wasteful number, since it uses less digits than its factorization.

155242212205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6405876.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 155242212205 its reverse (502212242551), we get a palindrome (657454454756).

The spelling of 155242212205 in words is "one hundred fifty-five billion, two hundred forty-two million, two hundred twelve thousand, two hundred five".