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152020161 = 3237456517
BaseRepresentation
bin10010000111110…
…10010011000001
3101121001102110100
421003322103001
5302404121121
623030153013
73524102316
oct1103722301
9347042410
10152020161
11788a1aa7
1242ab2769
1325658577
1416292d0d
15d52d026
hex90fa4c1

152020161 has 12 divisors (see below), whose sum is σ = 225519892. Its totient is φ = 98607456.

The previous prime is 152020139. The next prime is 152020163. The reversal of 152020161 is 161020251.

It can be written as a sum of positive squares in 2 ways, for example, as 82464561 + 69555600 = 9081^2 + 8340^2 .

It is not a de Polignac number, because 152020161 - 214 = 152003777 is a prime.

It is a super-2 number, since 2×1520201612 = 46220258700931842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152020163) 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, 227926 + ... + 228591.

Almost surely, 2152020161 is an apocalyptic number.

It is an amenable number.

152020161 is a deficient number, since it is larger than the sum of its proper divisors (73499731).

152020161 is a wasteful number, since it uses less digits than its factorization.

152020161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456560 (or 456557 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 152020161 is about 12329.6456153452. The cubic root of 152020161 is about 533.7039241599.

The spelling of 152020161 in words is "one hundred fifty-two million, twenty thousand, one hundred sixty-one".

Divisors: 1 3 9 37 111 333 456517 1369551 4108653 16891129 50673387 152020161