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145007855 = 529001571
BaseRepresentation
bin10001010010010…
…10010011101111
3101002212011101022
420221022103233
5244110222410
622220004355
73410355266
oct1051122357
9332764338
10145007855
1174942603
12406906bb
1324071885
14153895dd
15cae5455
hex8a4a4ef

145007855 has 4 divisors (see below), whose sum is σ = 174009432. Its totient is φ = 116006280.

The previous prime is 145007839. The next prime is 145007879. The reversal of 145007855 is 558700541.

145007855 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 558700541 = 779814363.

It is not a de Polignac number, because 145007855 - 24 = 145007839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14500781 + ... + 14500790.

It is an arithmetic number, because the mean of its divisors is an integer number (43502358).

Almost surely, 2145007855 is an apocalyptic number.

145007855 is a deficient number, since it is larger than the sum of its proper divisors (29001577).

145007855 is an equidigital number, since it uses as much as digits as its factorization.

145007855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29001576.

The product of its (nonzero) digits is 28000, while the sum is 35.

The square root of 145007855 is about 12041.9207354973. The cubic root of 145007855 is about 525.3682737292.

The spelling of 145007855 in words is "one hundred forty-five million, seven thousand, eight hundred fifty-five".

Divisors: 1 5 29001571 145007855