126233551 has 4 divisors (see below), whose sum is σ = 133659072. Its totient is φ = 118808032.

The previous prime is 126233533. The next prime is 126233567. The reversal of 126233551 is 155332621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155332621 = 17 ⋅9137213.

It is a cyclic number.

It is not a de Polignac number, because 126233551 - 2¹⁷ = 126102479 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 (126233501) 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, 3712735 + ... + 3712768.

It is an arithmetic number, because the mean of its divisors is an integer number (33414768).

Almost surely, 2^126233551 is an apocalyptic number.

126233551 is a deficient number, since it is larger than the sum of its proper divisors (7425521).

126233551 is an equidigital number, since it uses as much as digits as its factorization.

126233551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7425520.

The product of its digits is 5400, while the sum is 28.

The square root of 126233551 is about 11235.3705323857. The cubic root of 126233551 is about 501.6393538304.

The spelling of 126233551 in words is "one hundred twenty-six million, two hundred thirty-three thousand, five hundred fifty-one".