65552251 has 2 divisors, whose sum is σ = 65552252. Its totient is φ = 65552250.

The previous prime is 65552239. The next prime is 65552293. The reversal of 65552251 is 15225556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65552251 - 2¹⁷ = 65421179 is a prime.

It is a super-2 number, since 2×65552251² = 8594195222334002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65552651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32776125 + 32776126.

It is an arithmetic number, because the mean of its divisors is an integer number (32776126).

Almost surely, 2^65552251 is an apocalyptic number.

65552251 is a deficient number, since it is larger than the sum of its proper divisors (1).

65552251 is an equidigital number, since it uses as much as digits as its factorization.

65552251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15000, while the sum is 31.

The square root of 65552251 is about 8096.4344621568. The cubic root of 65552251 is about 403.2080583700.

The spelling of 65552251 in words is "sixty-five million, five hundred fifty-two thousand, two hundred fifty-one".