155361533 has 4 divisors (see below), whose sum is σ = 156899868. Its totient is φ = 153823200.

The previous prime is 155361523. The next prime is 155361541. The reversal of 155361533 is 335163551.

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 88416409 + 66945124 = 9403^2 + 8182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155361533 is a prime.

It is a super-2 number, since 2×155361533² = 48274411872220178, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155361533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155361523) 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 3 ways as a sum of consecutive naturals, for example, 769016 + ... + 769217.

It is an arithmetic number, because the mean of its divisors is an integer number (39224967).

Almost surely, 2^155361533 is an apocalyptic number.

It is an amenable number.

155361533 is a deficient number, since it is larger than the sum of its proper divisors (1538335).

155361533 is a wasteful number, since it uses less digits than its factorization.

155361533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538334.

The product of its digits is 20250, while the sum is 32.

The square root of 155361533 is about 12464.4106559436. The cubic root of 155361533 is about 537.5858545389.

The spelling of 155361533 in words is "one hundred fifty-five million, three hundred sixty-one thousand, five hundred thirty-three".