145511554 has 4 divisors (see below), whose sum is σ = 218267334. Its totient is φ = 72755776.

The previous prime is 145511549. The next prime is 145511563. The reversal of 145511554 is 455115541.

145511554 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 144360225 + 1151329 = 12015^2 + 1073^2 .

It is a super-2 number, since 2×145511554² = 42347224694989832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36377887 + ... + 36377890.

Almost surely, 2^145511554 is an apocalyptic number.

145511554 is a deficient number, since it is larger than the sum of its proper divisors (72755780).

145511554 is an equidigital number, since it uses as much as digits as its factorization.

145511554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72755779.

The product of its digits is 10000, while the sum is 31.

The square root of 145511554 is about 12062.8170010160. The cubic root of 145511554 is about 525.9758768159.

The spelling of 145511554 in words is "one hundred forty-five million, five hundred eleven thousand, five hundred fifty-four".