155253513 has 4 divisors (see below), whose sum is σ = 207004688. Its totient is φ = 103502340.

The previous prime is 155253509. The next prime is 155253523. The reversal of 155253513 is 315352551.

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 not a de Polignac number, because 155253513 - 2² = 155253509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155253523) 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, 25875583 + ... + 25875588.

It is an arithmetic number, because the mean of its divisors is an integer number (51751172).

Almost surely, 2^155253513 is an apocalyptic number.

It is an amenable number.

155253513 is a deficient number, since it is larger than the sum of its proper divisors (51751175).

155253513 is an equidigital number, since it uses as much as digits as its factorization.

155253513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51751174.

The product of its digits is 11250, while the sum is 30.

The square root of 155253513 is about 12460.0767654136. The cubic root of 155253513 is about 537.4612344856.

The spelling of 155253513 in words is "one hundred fifty-five million, two hundred fifty-three thousand, five hundred thirteen".