145187553 has 8 divisors (see below), whose sum is σ = 221238208. Its totient is φ = 82964304.

The previous prime is 145187527. The next prime is 145187561. The reversal of 145187553 is 355781541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145187553 - 2⁶ = 145187489 is a prime.

It is a super-2 number, since 2×145187553² = 42158851092255618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145187513) 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 7 ways as a sum of consecutive naturals, for example, 3456826 + ... + 3456867.

It is an arithmetic number, because the mean of its divisors is an integer number (27654776).

Almost surely, 2^145187553 is an apocalyptic number.

It is an amenable number.

145187553 is a deficient number, since it is larger than the sum of its proper divisors (76050655).

145187553 is an equidigital number, since it uses as much as digits as its factorization.

145187553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6913703.

The product of its digits is 84000, while the sum is 39.

The square root of 145187553 is about 12049.3797765694. The cubic root of 145187553 is about 525.5852014198.

The spelling of 145187553 in words is "one hundred forty-five million, one hundred eighty-seven thousand, five hundred fifty-three".