123053551 has 4 divisors (see below), whose sum is σ = 123235992. Its totient is φ = 122871112.

The previous prime is 123053549. The next prime is 123053621. The reversal of 123053551 is 155350321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155350321 = 7 ⋅22192903.

It is a cyclic number.

It is not a de Polignac number, because 123053551 - 2¹ = 123053549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123053501) 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, 90205 + ... + 91558.

It is an arithmetic number, because the mean of its divisors is an integer number (30808998).

Almost surely, 2^123053551 is an apocalyptic number.

123053551 is a deficient number, since it is larger than the sum of its proper divisors (182441).

123053551 is an equidigital number, since it uses as much as digits as its factorization.

123053551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182440.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 123053551 is about 11092.9505092198. The cubic root of 123053551 is about 497.3911461043.

The spelling of 123053551 in words is "one hundred twenty-three million, fifty-three thousand, five hundred fifty-one".