155131001223 has 16 divisors (see below), whose sum is σ = 225706735872. Its totient is φ = 93993104000.

The previous prime is 155131001189. The next prime is 155131001273. The reversal of 155131001223 is 322100131551.

It is a cyclic number.

It is not a de Polignac number, because 155131001223 - 2¹² = 155130997127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155131001193 and 155131001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155131001273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519138 + ... + 761423.

It is an arithmetic number, because the mean of its divisors is an integer number (14106670992).

Almost surely, 2^155131001223 is an apocalyptic number.

155131001223 is a deficient number, since it is larger than the sum of its proper divisors (70575734649).

155131001223 is a wasteful number, since it uses less digits than its factorization.

155131001223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284246.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 155131001223 its reverse (322100131551), we get a palindrome (477231132774).

The spelling of 155131001223 in words is "one hundred fifty-five billion, one hundred thirty-one million, one thousand, two hundred twenty-three".