155255501 has 4 divisors (see below), whose sum is σ = 155306400. Its totient is φ = 155204604.

The previous prime is 155255489. The next prime is 155255521. The reversal of 155255501 is 105552551.

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 155255501 - 2⁶ = 155255437 is a prime.

It is a super-2 number, since 2×155255501² = 48208541181522002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155255521) 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, 20561 + ... + 27078.

It is an arithmetic number, because the mean of its divisors is an integer number (38826600).

Almost surely, 2^155255501 is an apocalyptic number.

It is an amenable number.

155255501 is a deficient number, since it is larger than the sum of its proper divisors (50899).

155255501 is an equidigital number, since it uses as much as digits as its factorization.

155255501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50898.

The product of its (nonzero) digits is 6250, while the sum is 29.

The square root of 155255501 is about 12460.1565399476. The cubic root of 155255501 is about 537.4635285150.

The spelling of 155255501 in words is "one hundred fifty-five million, two hundred fifty-five thousand, five hundred one".