65155801 has 2 divisors, whose sum is σ = 65155802. Its totient is φ = 65155800.

The previous prime is 65155799. The next prime is 65155823. The reversal of 65155801 is 10855156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44689225 + 20466576 = 6685^2 + 4524^2 .

It is a cyclic number.

It is not a de Polignac number, because 65155801 - 2¹ = 65155799 is a prime.

Together with 65155799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65155841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32577900 + 32577901.

It is an arithmetic number, because the mean of its divisors is an integer number (32577901).

Almost surely, 2^65155801 is an apocalyptic number.

It is an amenable number.

65155801 is a deficient number, since it is larger than the sum of its proper divisors (1).

65155801 is an equidigital number, since it uses as much as digits as its factorization.

65155801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 65155801 is about 8071.9143330439. The cubic root of 65155801 is about 402.3935672703.

It can be divided in two parts, 65155 and 801, that added together give a palindrome (65956).

The spelling of 65155801 in words is "sixty-five million, one hundred fifty-five thousand, eight hundred one".