155240053 has 2 divisors, whose sum is σ = 155240054. Its totient is φ = 155240052.

The previous prime is 155240017. The next prime is 155240069. The reversal of 155240053 is 350042551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83210884 + 72029169 = 9122^2 + 8487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155240053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155240083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77620026 + 77620027.

It is an arithmetic number, because the mean of its divisors is an integer number (77620027).

Almost surely, 2^155240053 is an apocalyptic number.

It is an amenable number.

155240053 is a deficient number, since it is larger than the sum of its proper divisors (1).

155240053 is an equidigital number, since it uses as much as digits as its factorization.

155240053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 155240053 is about 12459.5366286231. The cubic root of 155240053 is about 537.4457019605.

The spelling of 155240053 in words is "one hundred fifty-five million, two hundred forty thousand, fifty-three".