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313102431 = 32157221587
BaseRepresentation
bin10010101010011…
…001000001011111
3210211011020210100
4102222121001133
51120123234211
651022512143
710521220035
oct2252310137
9724136710
10313102431
11150813544
1288a35653
134cb37815
142d824555
151c74b156
hex12a9905f

313102431 has 12 divisors (see below), whose sum is σ = 455141752. Its totient is φ = 207404496.

The previous prime is 313102423. The next prime is 313102451. The reversal of 313102431 is 134201313.

It is not a de Polignac number, because 313102431 - 23 = 313102423 is a prime.

It is a super-2 number, since 2×3131024312 = 196066264596219522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313102411) 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, 109381 + ... + 112206.

Almost surely, 2313102431 is an apocalyptic number.

313102431 is a deficient number, since it is larger than the sum of its proper divisors (142039321).

313102431 is a wasteful number, since it uses less digits than its factorization.

313102431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221750 (or 221747 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 313102431 is about 17694.7006473690. The cubic root of 313102431 is about 679.0401907203.

Adding to 313102431 its reverse (134201313), we get a palindrome (447303744).

The spelling of 313102431 in words is "three hundred thirteen million, one hundred two thousand, four hundred thirty-one".

Divisors: 1 3 9 157 471 1413 221587 664761 1994283 34789159 104367477 313102431