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133013131 = 139956929
BaseRepresentation
bin1111110110110…
…01111010001011
3100021021202201021
413323121322023
5233022410011
621110533311
73203410246
oct773317213
9307252637
10133013131
116909a809
1238667237
13217320c4
141394625d
15ba26471
hex7ed9e8b

133013131 has 4 divisors (see below), whose sum is σ = 133970200. Its totient is φ = 132056064.

The previous prime is 133013119. The next prime is 133013137. The reversal of 133013131 is 131310331.

Adding to 133013131 its reverse (131310331), we get a palindrome (264323462).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131310331 = 413202691.

It is a cyclic number.

It is not a de Polignac number, because 133013131 - 27 = 133013003 is a prime.

It is a super-2 number, since 2×1330131312 = 35384986036846322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133013137) 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, 478326 + ... + 478603.

It is an arithmetic number, because the mean of its divisors is an integer number (33492550).

Almost surely, 2133013131 is an apocalyptic number.

133013131 is a deficient number, since it is larger than the sum of its proper divisors (957069).

133013131 is an equidigital number, since it uses as much as digits as its factorization.

133013131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957068.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 133013131 is about 11533.1318816703. The cubic root of 133013131 is about 510.4636703388.

The spelling of 133013131 in words is "one hundred thirty-three million, thirteen thousand, one hundred thirty-one".

Divisors: 1 139 956929 133013131