[go: up one dir, main page]

Search a number
-
+
155373021 = 3223374093
BaseRepresentation
bin10010100001011…
…00110111011101
3101211100202201100
421100230313131
5304233414041
623230103313
73564435366
oct1120546735
9354322640
10155373021
117a782061
124404ab39
13262606cb
14168c6b6d
15d9916b6
hex942cddd

155373021 has 12 divisors (see below), whose sum is σ = 225393948. Its totient is φ = 103136064.

The previous prime is 155373017. The next prime is 155373059. The reversal of 155373021 is 120373551.

It can be written as a sum of positive squares in 2 ways, for example, as 21068100 + 134304921 = 4590^2 + 11589^2 .

It is not a de Polignac number, because 155373021 - 22 = 155373017 is a prime.

It is a super-3 number, since 3×1553730213 (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155373091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34950 + ... + 39143.

It is an arithmetic number, because the mean of its divisors is an integer number (18782829).

Almost surely, 2155373021 is an apocalyptic number.

It is an amenable number.

155373021 is a deficient number, since it is larger than the sum of its proper divisors (70020927).

155373021 is a wasteful number, since it uses less digits than its factorization.

155373021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74332 (or 74329 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 155373021 is about 12464.8714794818. The cubic root of 155373021 is about 537.5991045671.

The spelling of 155373021 in words is "one hundred fifty-five million, three hundred seventy-three thousand, twenty-one".

Divisors: 1 3 9 233 699 2097 74093 222279 666837 17263669 51791007 155373021