155400053 has 4 divisors (see below), whose sum is σ = 155576928. Its totient is φ = 155223180.

The previous prime is 155400017. The next prime is 155400061. The reversal of 155400053 is 350004551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155400053 - 2²⁴ = 138622837 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 (155400073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87113 + ... + 88878.

It is an arithmetic number, because the mean of its divisors is an integer number (38894232).

Almost surely, 2^155400053 is an apocalyptic number.

It is an amenable number.

155400053 is a deficient number, since it is larger than the sum of its proper divisors (176875).

155400053 is an equidigital number, since it uses as much as digits as its factorization.

155400053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176874.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 155400053 is about 12465.9557595878. The cubic root of 155400053 is about 537.6302801560.

The spelling of 155400053 in words is "one hundred fifty-five million, four hundred thousand, fifty-three".