Search a number
-
+
161155402 = 2113713077
BaseRepresentation
bin10011001101100…
…00100101001010
3102020020112122121
421212300211022
5312223433102
623554041454
73664540552
oct1146604512
9366215577
10161155402
1182a71491
1245b7928a
1327506635
1417590162
15e234b37
hex99b094a

161155402 has 8 divisors (see below), whose sum is σ = 243872676. Its totient is φ = 79864512.

The previous prime is 161155399. The next prime is 161155409. The reversal of 161155402 is 204551161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 138791961 + 22363441 = 11781^2 + 4729^2 .

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

It is not an unprimeable number, because it can be changed into a prime (161155409) 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, 356313 + ... + 356764.

Almost surely, 2161155402 is an apocalyptic number.

161155402 is a deficient number, since it is larger than the sum of its proper divisors (82717274).

161155402 is a wasteful number, since it uses less digits than its factorization.

161155402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713192.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 161155402 is about 12694.6997601361. The cubic root of 161155402 is about 544.1871585154.

The spelling of 161155402 in words is "one hundred sixty-one million, one hundred fifty-five thousand, four hundred two".

Divisors: 1 2 113 226 713077 1426154 80577701 161155402