155220453 has 6 divisors (see below), whose sum is σ = 224207334. Its totient is φ = 103480296.

The previous prime is 155220433. The next prime is 155220463. The reversal of 155220453 is 354022551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 147914244 + 7306209 = 12162^2 + 2703^2 .

It is not a de Polignac number, because 155220453 - 2⁶ = 155220389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155220433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8623350 + ... + 8623367.

It is an arithmetic number, because the mean of its divisors is an integer number (37367889).

Almost surely, 2^155220453 is an apocalyptic number.

It is an amenable number.

155220453 is a deficient number, since it is larger than the sum of its proper divisors (68986881).

155220453 is a wasteful number, since it uses less digits than its factorization.

155220453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17246723 (or 17246720 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 155220453 is about 12458.7500576904. The cubic root of 155220453 is about 537.4230824133.

The spelling of 155220453 in words is "one hundred fifty-five million, two hundred twenty thousand, four hundred fifty-three".