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90155005 = 540514451
BaseRepresentation
bin1010101111110…
…10011111111101
320021122100102021
411113322133331
5141034430010
612540200141
72143206403
oct527723775
9207570367
1090155005
1146987876
1226239051
13158a7675
14bd8b473
157dac8da
hex55fa7fd

90155005 has 8 divisors (see below), whose sum is σ = 108237024. Its totient is φ = 72090000.

The previous prime is 90154993. The next prime is 90155033. The reversal of 90155005 is 50055109.

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

It is not a de Polignac number, because 90155005 - 225 = 56600573 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 7 ways as a sum of consecutive naturals, for example, 18030 + ... + 22480.

It is an arithmetic number, because the mean of its divisors is an integer number (13529628).

Almost surely, 290155005 is an apocalyptic number.

It is an amenable number.

90155005 is a deficient number, since it is larger than the sum of its proper divisors (18082019).

90155005 is a wasteful number, since it uses less digits than its factorization.

90155005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8507.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 90155005 is about 9494.9989468141. The cubic root of 90155005 is about 448.3976012246.

The spelling of 90155005 in words is "ninety million, one hundred fifty-five thousand, five".

Divisors: 1 5 4051 4451 20255 22255 18031001 90155005