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2131972 = 22532993
BaseRepresentation
bin1000001000100000000100
311000022111221
420020200010
51021210342
6113410124
724056443
oct10104004
94008457
102131972
111226867
12869944
1359852b
143d6d5a
152c1a67
hex208804

2131972 has 6 divisors (see below), whose sum is σ = 3730958. Its totient is φ = 1065984.

The previous prime is 2131951. The next prime is 2131979. The reversal of 2131972 is 2791312.

It can be written as a sum of positive squares in only one way, i.e., 1179396 + 952576 = 1086^2 + 976^2 .

It is not an unprimeable number, because it can be changed into a prime (2131979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266493 + ... + 266500.

22131972 is an apocalyptic number.

It is an amenable number.

2131972 is a deficient number, since it is larger than the sum of its proper divisors (1598986).

2131972 is a wasteful number, since it uses less digits than its factorization.

2131972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532997 (or 532995 counting only the distinct ones).

The product of its digits is 756, while the sum is 25.

The square root of 2131972 is about 1460.1273917025. The cubic root of 2131972 is about 128.7045297692.

The spelling of 2131972 in words is "two million, one hundred thirty-one thousand, nine hundred seventy-two".

Divisors: 1 2 4 532993 1065986 2131972