545501251 has 2 divisors, whose sum is σ = 545501252. Its totient is φ = 545501250.

The previous prime is 545501221. The next prime is 545501263. The reversal of 545501251 is 152105545.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 545501251 - 2⁷ = 545501123 is a prime.

It is a super-2 number, since 2×545501251² = 595143229685130002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (545501221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272750625 + 272750626.

It is an arithmetic number, because the mean of its divisors is an integer number (272750626).

Almost surely, 2^545501251 is an apocalyptic number.

545501251 is a deficient number, since it is larger than the sum of its proper divisors (1).

545501251 is an equidigital number, since it uses as much as digits as its factorization.

545501251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 545501251 is about 23355.9682094320. The cubic root of 545501251 is about 817.0812606724.

Adding to 545501251 its reverse (152105545), we get a palindrome (697606796).

The spelling of 545501251 in words is "five hundred forty-five million, five hundred one thousand, two hundred fifty-one".