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31001094 = 2321722283
BaseRepresentation
bin111011001000…
…0101000000110
32011100000111200
41312100220012
530414013334
63024243330
7524335125
oct166205006
964300450
1031001094
1116554643
12a470546
136565857
14418dabc
152ac5799
hex1d90a06

31001094 has 12 divisors (see below), whose sum is σ = 67169076. Its totient is φ = 10333692.

The previous prime is 31001093. The next prime is 31001099. The reversal of 31001094 is 49010013.

It is a super-2 number, since 2×310010942 = 1922135658393672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1722283 = 31001094 / (3 + 1 + 0 + 0 + 1 + 0 + 9 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31001093) 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, 861124 + ... + 861159.

It is an arithmetic number, because the mean of its divisors is an integer number (5597423).

Almost surely, 231001094 is an apocalyptic number.

31001094 is an abundant number, since it is smaller than the sum of its proper divisors (36167982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31001094 is a wasteful number, since it uses less digits than its factorization.

31001094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722291 (or 1722288 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 31001094 is about 5567.8626060635. The cubic root of 31001094 is about 314.1417605402.

The spelling of 31001094 in words is "thirty-one million, one thousand, ninety-four".

Divisors: 1 2 3 6 9 18 1722283 3444566 5166849 10333698 15500547 31001094