551266541 has 4 divisors (see below), whose sum is σ = 630018912. Its totient is φ = 472514172.

The previous prime is 551266523. The next prime is 551266561. The reversal of 551266541 is 145662155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 551266541 - 2⁶ = 551266477 is a prime.

It is a super-2 number, since 2×551266541² = 607789598452209362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551266501) 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, 39376175 + ... + 39376188.

It is an arithmetic number, because the mean of its divisors is an integer number (157504728).

Almost surely, 2^551266541 is an apocalyptic number.

It is an amenable number.

551266541 is a deficient number, since it is larger than the sum of its proper divisors (78752371).

551266541 is an equidigital number, since it uses as much as digits as its factorization.

551266541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78752370.

The product of its digits is 36000, while the sum is 35.

The square root of 551266541 is about 23479.0660163474. The cubic root of 551266541 is about 819.9496999683.

It can be divided in two parts, 551 and 266541, that multiplied together give a triangular number (146864091 = T₁₇₁₃₈).

The spelling of 551266541 in words is "five hundred fifty-one million, two hundred sixty-six thousand, five hundred forty-one".