145111554 has 64 divisors (see below), whose sum is σ = 384583680. Its totient is φ = 39655440.

The previous prime is 145111553. The next prime is 145111573. The reversal of 145111554 is 455111541.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (145111553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349 + ... + 17039.

It is an arithmetic number, because the mean of its divisors is an integer number (6009120).

Almost surely, 2^145111554 is an apocalyptic number.

145111554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 145111554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192291840).

145111554 is an abundant number, since it is smaller than the sum of its proper divisors (239472126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145111554 is a wasteful number, since it uses less digits than its factorization.

145111554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16732 (or 16726 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 145111554 is about 12046.2257159660. The cubic root of 145111554 is about 525.4934788615.

The spelling of 145111554 in words is "one hundred forty-five million, one hundred eleven thousand, five hundred fifty-four".