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155000051 = 1169913249
BaseRepresentation
bin10010011110100…
…01110011110011
3101210122211002122
421033101303303
5304140000201
623214104455
73561323123
oct1117216363
9353584078
10155000051
117a547918
1243aab12b
132615ca0b
141682ac83
15d91ae1b
hex93d1cf3

155000051 has 4 divisors (see below), whose sum is σ = 155025000. Its totient is φ = 154975104.

The previous prime is 155000047. The next prime is 155000057. The reversal of 155000051 is 150000551.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 155000051 - 22 = 155000047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154999993 and 155000029.

It is not an unprimeable number, because it can be changed into a prime (155000057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5075 + ... + 18323.

It is an arithmetic number, because the mean of its divisors is an integer number (38756250).

Almost surely, 2155000051 is an apocalyptic number.

155000051 is a deficient number, since it is larger than the sum of its proper divisors (24949).

155000051 is a wasteful number, since it uses less digits than its factorization.

155000051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24948.

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 155000051 is about 12449.9016461979. The cubic root of 155000051 is about 537.1685944097.

The spelling of 155000051 in words is "one hundred fifty-five million, fifty-one", and thus it is an aban number.

Divisors: 1 11699 13249 155000051