155216653 has 4 divisors (see below), whose sum is σ = 155252860. Its totient is φ = 155180448.

The previous prime is 155216651. The next prime is 155216657. The reversal of 155216653 is 356612551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86359849 + 68856804 = 9293^2 + 8298^2 .

It is a cyclic number.

It is not a de Polignac number, because 155216653 - 2¹ = 155216651 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 (155216651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10650 + ... + 20587.

It is an arithmetic number, because the mean of its divisors is an integer number (38813215).

Almost surely, 2^155216653 is an apocalyptic number.

It is an amenable number.

155216653 is a deficient number, since it is larger than the sum of its proper divisors (36207).

155216653 is an equidigital number, since it uses as much as digits as its factorization.

155216653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36206.

The product of its digits is 27000, while the sum is 34.

The square root of 155216653 is about 12458.5975534969. The cubic root of 155216653 is about 537.4186967705.

The spelling of 155216653 in words is "one hundred fifty-five million, two hundred sixteen thousand, six hundred fifty-three".