123047551 has 24 divisors (see below), whose sum is σ = 142481664. Its totient is φ = 105332640.

The previous prime is 123047549. The next prime is 123047563. The reversal of 123047551 is 155740321.

It is a happy number.

It is not a de Polignac number, because 123047551 - 2¹ = 123047549 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 (123047501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 434656 + ... + 434938.

It is an arithmetic number, because the mean of its divisors is an integer number (5936736).

Almost surely, 2^123047551 is an apocalyptic number.

123047551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123047551 is a deficient number, since it is larger than the sum of its proper divisors (19434113).

123047551 is a wasteful number, since it uses less digits than its factorization.

123047551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 123047551 is about 11092.6800638980. The cubic root of 123047551 is about 497.3830618316.

Adding to 123047551 its reverse (155740321), we get a palindrome (278787872).

The spelling of 123047551 in words is "one hundred twenty-three million, forty-seven thousand, five hundred fifty-one".