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2148831 = 32238759
BaseRepresentation
bin1000001100100111011111
311001011122100
420030213133
51022230311
6114020143
724156546
oct10144737
94034570
102148831
1112384a3
12877653
135a30c9
143dd15d
152c6a56
hex20c9df

2148831 has 6 divisors (see below), whose sum is σ = 3103880. Its totient is φ = 1432548.

The previous prime is 2148803. The next prime is 2148857. The reversal of 2148831 is 1388412.

It is not a de Polignac number, because 2148831 - 25 = 2148799 is a prime.

It is a super-2 number, since 2×21488312 = 9234949333122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 2148795 and 2148804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2148631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119371 + ... + 119388.

22148831 is an apocalyptic number.

2148831 is a deficient number, since it is larger than the sum of its proper divisors (955049).

2148831 is a wasteful number, since it uses less digits than its factorization.

2148831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238765 (or 238762 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 2148831 is about 1465.8891499701. The cubic root of 2148831 is about 129.0428918125.

It can be divided in two parts, 214 and 8831, that added together give a triangular number (9045 = T134).

The spelling of 2148831 in words is "two million, one hundred forty-eight thousand, eight hundred thirty-one".

Divisors: 1 3 9 238759 716277 2148831