Search a number
-
+
131053251 = 376240631
BaseRepresentation
bin1111100111110…
…11011011000011
3100010121012021010
413303323123003
5232022201001
621000532003
73150635310
oct763733303
9303535233
10131053251
1167a8127a
1237a81003
13211c7004
1413595d07
15b78a8d6
hex7cfb6c3

131053251 has 8 divisors (see below), whose sum is σ = 199700224. Its totient is φ = 74887560.

The previous prime is 131053243. The next prime is 131053253. The reversal of 131053251 is 152350131.

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

It is not a de Polignac number, because 131053251 - 23 = 131053243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 6240631 = 131053251 / (1 + 3 + 1 + 0 + 5 + 3 + 2 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131053253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3120295 + ... + 3120336.

It is an arithmetic number, because the mean of its divisors is an integer number (24962528).

Almost surely, 2131053251 is an apocalyptic number.

131053251 is a deficient number, since it is larger than the sum of its proper divisors (68646973).

131053251 is an equidigital number, since it uses as much as digits as its factorization.

131053251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6240641.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 131053251 is about 11447.8491866376. The cubic root of 131053251 is about 507.9441149489.

The spelling of 131053251 in words is "one hundred thirty-one million, fifty-three thousand, two hundred fifty-one".

Divisors: 1 3 7 21 6240631 18721893 43684417 131053251