123554431 has 48 divisors (see below), whose sum is σ = 171304000. Its totient is φ = 88482240.

The previous prime is 123554423. The next prime is 123554467. The reversal of 123554431 is 134455321.

It is not a de Polignac number, because 123554431 - 2³ = 123554423 is a prime.

It is a super-2 number, since 2×123554431² = 30531394839467522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123554431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123554731) 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, 539425 + ... + 539653.

Almost surely, 2^123554431 is an apocalyptic number.

123554431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123554431 is a deficient number, since it is larger than the sum of its proper divisors (47749569).

123554431 is a wasteful number, since it uses less digits than its factorization.

123554431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 260 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 123554431 is about 11115.5040821368. The cubic root of 123554431 is about 498.0650966232.

The spelling of 123554431 in words is "one hundred twenty-three million, five hundred fifty-four thousand, four hundred thirty-one".