123151555254 has 96 divisors (see below), whose sum is σ = 308878859520. Its totient is φ = 32445499968.

The previous prime is 123151555243. The next prime is 123151555259. The reversal of 123151555254 is 452555151321.

It is a super-2 number, since 2×123151555254² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123151555259) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3740637 + ... + 3773415.

It is an arithmetic number, because the mean of its divisors is an integer number (3217488120).

Almost surely, 2^123151555254 is an apocalyptic number.

123151555254 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123151555254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154439429760).

123151555254 is an abundant number, since it is smaller than the sum of its proper divisors (185727304266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123151555254 is a wasteful number, since it uses less digits than its factorization.

123151555254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33794 (or 33787 counting only the distinct ones).

The product of its digits is 150000, while the sum is 39.

The spelling of 123151555254 in words is "one hundred twenty-three billion, one hundred fifty-one million, five hundred fifty-five thousand, two hundred fifty-four".